Portenta H7: SPI, Wire, Analog, PWM, ...

This is sort of a hand merge of PR arduino#82 which supersedes arduino#71

Adds in the SPI, Wire, Some Analog, some PWM, access to all of the pins.
This has a reduced full pin table, but also introduced the use of pin names
using slightly stripped down table that was used for MBED version

Author: KurtE

loader/boards/arduino_portenta_h7_stm32h747xx_m7.conf

@@ -11,6 +11,9 @@ CONFIG_CDC_ACM_DTE_RATE_CALLBACK_SUPPORT=y
 
 CONFIG_LLEXT_STORAGE_WRITABLE=n
 
+CONFIG_SHARED_MULTI_HEAP=y
+CONFIG_HEAP_MEM_POOL_SIZE=2048
+
 CONFIG_FPU=y
 CONFIG_ICACHE=y
 CONFIG_DCACHE=y
@@ -24,8 +27,12 @@ CONFIG_SHELL_STACK_SIZE=32768
 CONFIG_MAIN_STACK_SIZE=32768
 CONFIG_LLEXT_HEAP_SIZE=128
 
-#CONFIG_ADC=y
-#CONFIG_PWM=y
+CONFIG_ADC=y
+CONFIG_PWM=y
+CONFIG_DMA=y
+CONFIG_MEMC=y
+CONFIG_SPI_ASYNC=y
+CONFIG_SPI_STM32_INTERRUPT=y
 
 CONFIG_NET_CORE_LOG_LEVEL_DBG=y
 
@@ -78,3 +85,15 @@ CONFIG_MBEDTLS_HEAP_SIZE=60000
 CONFIG_MBEDTLS_SSL_MAX_CONTENT_LEN=7168
 CONFIG_MBEDTLS_HASH_ALL_ENABLED=y
 CONFIG_MBEDTLS_CMAC=y
+
+
+CONFIG_VIDEO=y
+CONFIG_VIDEO_LOG_LEVEL_DBG=y
+CONFIG_VIDEO_STM32_DCMI=y
+CONFIG_VIDEO_BUFFER_POOL_NUM_MAX=3
+CONFIG_VIDEO_BUFFER_POOL_SZ_MAX=614400
+CONFIG_VIDEO_BUFFER_POOL_ALIGN=32
+CONFIG_VIDEO_BUFFER_USE_SHARED_MULTI_HEAP=y
+CONFIG_VIDEO_BUFFER_SMH_ATTRIBUTE=2
+CONFIG_VIDEO_GC2145=y
+CONFIG_FLASH=y