ChromeEC boards: Drop IGNORE_IASL_MISSING_DEPENDENCY

This should no longer be needed because the ASL has been fixed.

Change-Id: I4d1500217bef54fa3d2be397e5e2a155da3f965d
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63525
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/mainboard/google/skyrim/Kconfig

@@ -5,9 +5,6 @@ config BOARD_GOOGLE_BASEBOARD_SKYRIM
 
 if BOARD_GOOGLE_BASEBOARD_SKYRIM
 
-config IGNORE_IASL_MISSING_DEPENDENCY
-	def_bool y
-
 config AMD_FWM_POSITION_INDEX
 	int
 	default 3