mb/protectli/vault_bsw: Drop `_PRS` from static devices

The `_PRS` ACPI object is not needed for static (non-configurable)
devices. For devices where `_CRS` always provides the same set of
resource settings, drop the `_PRS` object. Note that every dropped
`_PRS` object only provides one set of resource settings, which is
identical to the resource settings provided by the `_CRS` object.

Also, drop `IGNORE_IASL_MISSING_DEPENDENCY` as it's no longer needed.

Change-Id: Ic37608ac9622b37cae6d81045740a033e9aa9d4f
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63526
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/mainboard/protectli/vault_bsw/Kconfig

@@ -1,8 +1,5 @@
 if BOARD_PROTECTLI_FW2B || BOARD_PROTECTLI_FW4B
 
-config IGNORE_IASL_MISSING_DEPENDENCY
-	def_bool y
-
 config BOARD_SPECIFIC_OPTIONS
 	def_bool y
 	select BOARD_ROMSIZE_KB_8192

src/mainboard/protectli/vault_bsw/acpi/superio.asl

@@ -14,13 +14,4 @@ Device (COM1) {
 		FixedIO (0x03F8, 0x08)
 		IRQNoFlags () {4}
 	})
-
-	Name (_PRS, ResourceTemplate ()
-	{
-		StartDependentFn (0, 0) {
-			FixedIO (0x03F8, 0x08)
-			IRQNoFlags () {4}
-		}
-		EndDependentFn ()
-	})
 }