soc/intel/alderlake: Remove superfluous preprocessor argument

The if statement is repeated so merge it into one block.

Change-Id: I92f6d1b0a7fed4730f11e572b076f5dfdb91d96f
Signed-off-by: Sean Rhodes <sean@starlabs.systems>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/84621
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jayvik Desai <jayvik@google.com>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
Reviewed-by: Elyes Haouas <ehaouas@noos.fr>

src/soc/intel/alderlake/acpi/pcie.asl

@@ -310,9 +310,7 @@ Device (PEG0)
 {
 	Name (_ADR, 0x00060000)
 }
-#endif
 
-#if CONFIG(SOC_INTEL_ALDERLAKE_PCH_P)
 Device (PEG1)
 {
 	Name (_ADR, 0x00060002)