soc/amd/exit_car.S: Drop redundant enabling cache

This is already done in arch/x86/exit_car.S

Change-Id: Ie954aa11d5e76aaa3e2185ba552aafe8d075feb6
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37179
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>

src/soc/amd/common/block/cpu/car/exit_car.S

@@ -29,9 +29,4 @@ chipset_teardown_car:
 
 	AMD_DISABLE_STACK
 
-	/* enable cache */
-	movl	%cr0, %eax
-	andl	$(~(CR0_CD | CR0_NW)), %eax
-	movl	%eax, %cr0
-
 	jmp	*%esp