galp5 : add console debug output to SPI so that unbootable system can have flash externally backup and inspected

TODO: turn on additional debugging in case more is needed with
docker run -e DISPLAY=$DISPLAY --network host --rm -ti -v $(pwd):$(pwd) -w $(pwd) tlaurion/heads-dev-env:latest -- make BOARD=galp5 coreboot.modify_and_save_oldconfig_in_place

in DEBUGGING settings of coreboot menuconfig menu.

Signed-off-by: Thierry Laurion <insurgo@riseup.net>

Author: tlaurion

config/coreboot-galp5.config

@@ -559,6 +559,7 @@ CONFIG_NO_EARLY_GFX_INIT=y
 CONFIG_GENERIC_LINEAR_FRAMEBUFFER=y
 CONFIG_LINEAR_FRAMEBUFFER=y
 CONFIG_BOOTSPLASH=y
+CONFIG_HEAP_SIZE=0x400000
 # end of Display
 
 CONFIG_PCI=y
@@ -716,7 +717,6 @@ CONFIG_PLATFORM_HAS_DRAM_CLEAR=y
 CONFIG_BOOTMEDIA_LOCK_NONE=y
 # CONFIG_BOOTMEDIA_LOCK_CONTROLLER is not set
 # CONFIG_BOOTMEDIA_LOCK_CHIP is not set
-# CONFIG_BOOTMEDIA_SMM_BWP is not set
 # end of Security
 
 CONFIG_ACPI_HAVE_PCAT_8259=y
@@ -732,7 +732,6 @@ CONFIG_BOOT_DEVICE_SPI_FLASH=y
 CONFIG_BOOT_DEVICE_MEMORY_MAPPED=y
 CONFIG_BOOT_DEVICE_SUPPORTS_WRITES=y
 CONFIG_RTC=y
-CONFIG_HEAP_SIZE=0x400000
 
 #
 # Console
@@ -758,7 +757,8 @@ CONFIG_TTYS0_LCS=3
 # CONFIG_SPKMODEM is not set
 # CONFIG_CONSOLE_NE2K is not set
 CONFIG_CONSOLE_CBMEM=y
-# CONFIG_CONSOLE_SPI_FLASH is not set
+CONFIG_CONSOLE_SPI_FLASH=y
+CONFIG_CONSOLE_SPI_FLASH_BUFFER_SIZE=0x20000
 # CONFIG_CONSOLE_I2C_SMBUS is not set
 # CONFIG_CONSOLE_SYSTEM76_EC is not set
 # CONFIG_DEFAULT_CONSOLE_LOGLEVEL_8 is not set