Fix to allow the DMP code to compile on Apollo3 v2

Author: PaulZC

library.properties

@@ -1,5 +1,5 @@
 name=SparkFun 9DoF IMU Breakout - ICM 20948 - Arduino Library
-version=1.2.7
+version=1.2.8
 author=SparkFun Electronics <[email protected]>
 maintainer=SparkFun Electronics <sparkfun.com>
 sentence=Use the low-power high-resolution ICM 20948 9 DoF IMU from Invensense with I2C or SPI. Version 1.2 of the library includes support for the InvenSense Digital Motion Processor (DMP™).

src/util/ICM_20948_C.c

@@ -8,7 +8,9 @@
 */
 #if defined(ICM_20948_USE_DMP) // Only include the 14301 Bytes of DMP if ICM_20948_USE_DMP is defined
 
-#if defined(__AVR__) || defined(__arm__) || defined(__ARDUINO_ARC__) // Store the DMP firmware in PROGMEM on older AVR (ATmega) platforms
+#if defined(ARDUINO_ARCH_MBED) // ARDUINO_ARCH_MBED (APOLLO3 v2) does not support or require pgmspace.h / PROGMEM
+const uint8_t dmp3_image[] = {
+#elif defined(__AVR__) || defined(__arm__) || defined(__ARDUINO_ARC__) // Store the DMP firmware in PROGMEM on older AVR (ATmega) platforms
 #define ICM_20948_USE_PROGMEM_FOR_DMP
 #include <avr/pgmspace.h>
 const uint8_t dmp3_image[] PROGMEM = {