PX4-Autopilot: ICM20948 in HERE 2 is not detected

Describe the bug The ICM20948 in the HERE 2 from ProfiCNC is not detected. WHOAMI value 0x00 is read.

To Reproduce Steps to reproduce the behavior:

1. Connect HERE 2 to Pixhawk 2.1
2. Flash PX4 master
3. Boot flightcontroller
4. See warning WARN [mpu9250] no device on bus 2

I’ve added a few lines of debug code and have figured out that the WHOAMI value is returned as 0x00

/*
 * If it's not an MPU it must be an ICM
 * Make sure register bank 0 is selected - whoami is only present on bank 0, and that is
 * not sure e.g. if the device has rebooted without repowering the sensor
 */
write(ICMREG_20948_BANK_SEL, &register_select, 1);
read(ICMREG_20948_WHOAMI, &whoami, 1);
warnx("whoami returned %u", (unsigned)whoami);

FMUv2 ver 0xE : Rev 0 V30
[boot] Fault Log info File No 4 Length 3177 flags:0x01 state:1
[boot] Fault Log is Armed
sercon: Registering CDC/ACM serial driver
sercon: Successfully registered the CDC/ACM serial driver
HW arch: PX4_FMU_V3
HW type: V30
HW version: 0x0009000E
HW revision: 0x00000000
FW git-hash: 8a313ffc26985f1c81ea494dbcf20760ff3be59a
FW version: 1.9.0 0 (17367040)
FW git-branch: master
OS: NuttX
OS version: Release 7.22.0 (118882559)
OS git-hash: c225d4a691ef4572839b19635a84f2d9bf07ea74
Build datetime: Jan 15 2019 08:34:24
Build uri: localhost
Toolchain: GNU GCC, 7.2.1 20170904 (release) [ARM/embedded-7-branch revision 255204]
PX4GUID: 0001000000003334353731375103003e0045
MCU: STM32F42x, rev. 3
[hardfault_log] Fault Log is Armed
INFO  [tune_control] Publishing standard tune 1
INFO  [dataman] Unknown restart, data manager file '/fs/microsd/dataman' size is 350216 bytes
INFO  [param] selected parameter default file /fs/mtd_params
rgbled on I2C bus 1 at 0x55 (bus: 100 KHz, max: 100 KHz)
WARN  [rgbled_ncp5623c] no RGB led on bus #2
nsh: rgbled_pwm: command not found
Board init: /etc/init.d/rc.board
WARN  [hmc5883] no device on bus 1 (type: 2)
WARN  [lis3mdl] no device on bus 2
INFO  [ist8310] no device on bus 1
INFO  [ist8310] no device on bus 5
INFO  [mpu9250] Bus probed: 2
WARN  [mpu9250] whoami returned 0
WARN  [mpu9250] no device on bus 2, init not OK
WARN  [hmc5883] no device on bus 2 (type: 1)
WARN  [mpu6000] no device on bus #3 (SPI1)
WARN  [mpu6000] no device on bus #5 (SPI4)
INFO  [mpu9250] Bus probed: 5
MPU9250 on SPI bus 4 at 4 (1000 KHz)
INFO  [mpu9250] accel cutoff set to 30.00 Hz
INFO  [mpu9250] gyro cutoff set to 80.00 Hz
L3GD20 on SPI bus 4 at 1 (11000 KHz)
LSM303D on SPI bus 4 at 2 (11000 KHz)
INFO  [mpu9250] Bus probed: 3
MPU9250 on SPI bus 1 at 4 (1000 KHz)
INFO  [mpu9250] accel cutoff set to 30.00 Hz
INFO  [mpu9250] gyro cutoff set to 80.00 Hz
MS5611_SPI on SPI bus 4 at 3 (20000 KHz)
MS5611_SPI on SPI bus 1 at 3 (20000 KHz)
WARN  [bst] no devices found
INFO  [mpu9250] Bus probed: 2
WARN  [mpu9250] whoami returned 0
WARN  [mpu9250] no device on bus 2, init not OK
px4flow [69:100]
INFO  [px4flow] scanning I2C buses for device..
INFO  [mavlink] mode: Config, data rate: 800000 B/s on /dev/ttyACM0 @ 57600B
Starting Main GPS on /dev/ttyS3
Starting MAVLink on /dev/ttyS1
INFO  [mavlink] mode: Normal, data rate: 1200 B/s on /dev/ttyS1 @ 57600B
No autostart ID found
INFO  [logger] logger started (mode=all)

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