drivers/intel/mipi_camera: Rename flash enum to match SSDB field

Retitle the SSDB flash-support enum to `flash_support`, aligning its
name with the field in the struct and the spec. Also keep the existing
values and clarify the default case comment.

Change-Id: I49d825cb44d7f8784350e29e8b2b5a0772549f56
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/90185
Reviewed-by: Sean Rhodes <sean@starlabs.systems>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/drivers/intel/mipi_camera/ssdb.h

@@ -37,8 +37,9 @@ enum platform_type {
 	PLAT_NVL,
 };
 
-enum intel_camera_flash_type {
-	FLASH_DEFAULT = 0,
+
+enum flash_support {
+	FLASH_DEFAULT = 0,	/* default is driver defined */
 	FLASH_DISABLE = 2,
 	FLASH_ENABLE = 3
 };