physmap: rename to hwaccess_physmap, create own header

Line up physmap with the other hwaccess related code.

Change-Id: Ieba6f4e94cfc3e668fcb8b3c978de5908aed2592
Signed-off-by: Thomas Heijligen <thomas.heijligen@secunet.com>
Original-Reviewed-on: https://review.coreboot.org/c/flashrom/+/60113
Original-Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/flashrom-stable/+/72267
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/Makefile b/Makefile
index d9cc6ce..b73bcb9 100644
--- a/Makefile
+++ b/Makefile
@@ -783,7 +783,7 @@
 ifneq ($(NEED_RAW_ACCESS), )
 # Raw memory, MSR or PCI port I/O access.
 FEATURE_CFLAGS += -D'NEED_RAW_ACCESS=1'
-PROGRAMMER_OBJS += physmap.o hwaccess.o
+PROGRAMMER_OBJS += hwaccess.o hwaccess_physmap.o
 
 ifeq ($(ARCH), x86)
 FEATURE_CFLAGS += -D'__FLASHROM_HAVE_OUTB__=1'