Move the `BUILDING_WITH_DEBUG_FSP` Kconfig option from SoC-specific
files to the FSP2_0 driver Kconfig to avoid duplication. Also slightly
improves the option's prompt and help text.
TEST=Built and booted google/rex successfully.
Change-Id: I5c3dce59c396f6c1665a3ed1b8c1bb5df0f5a8d4
Signed-off-by: Subrata Banik <subratabanik@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/84220
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <ericllai@google.com>