sb/amd/cimx: replace cimx_util with common ACPIMMIO AMD block

Drop the redundant cimx_util, remove the includes when appropriate and
replace the implementation with amdblocks/acpimmio where needed.

TEST=boot PC Engines apu1 and launch Debian with Linux kernel 4.14.50

Signed-off-by: Michał Żygowski <michal.zygowski@3mdeb.com>
Change-Id: I66b1f82926372b6ebb570893b6eb73c7f2935b9d
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37328
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
diff --git a/src/southbridge/amd/cimx/sb800/Kconfig b/src/southbridge/amd/cimx/sb800/Kconfig
index aa5160b..0b790b0 100644
--- a/src/southbridge/amd/cimx/sb800/Kconfig
+++ b/src/southbridge/amd/cimx/sb800/Kconfig
@@ -21,6 +21,9 @@
 	select AMD_SB_CIMX
 	select HAVE_CF9_RESET
 	select HAVE_CF9_RESET_PREPARE
+	select SOC_AMD_COMMON
+	select SOC_AMD_COMMON_BLOCK
+	select SOC_AMD_COMMON_BLOCK_ACPIMMIO
 
 if SOUTHBRIDGE_AMD_CIMX_SB800
 config BOOTBLOCK_SOUTHBRIDGE_INIT