Makefile: Turn x86-arch comments into `if`

Actually check what the comments suggest. Supposed to fix non-x86 on
NetBSD and OpenBSD.

Change-Id: I440919c12e54ca4371e21bc8d1b5ab64692fb4b8
Signed-off-by: Nico Huber <nico.h@gmx.de>
Original-Reviewed-on: https://review.coreboot.org/c/flashrom/+/52486
Original-Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/flashrom-stable/+/70928
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/Makefile b/Makefile
index fa4bbbd..a1d7d8d 100644
--- a/Makefile
+++ b/Makefile
@@ -1078,12 +1078,14 @@
 PROGRAMMER_OBJS += physmap.o hwaccess.o
 
 ifeq ($(TARGET_OS), NetBSD)
-# For (i386|x86_64)_iopl(2).
+ifeq ($(ARCH), x86)
 PCILIBS += -l$(shell uname -p)
+endif
 else
 ifeq ($(TARGET_OS), OpenBSD)
-# For (i386|amd64)_iopl(2).
+ifeq ($(ARCH), x86)
 PCILIBS += -l$(shell uname -m)
+endif
 else
 ifeq ($(TARGET_OS), Darwin)
 # DirectHW framework can be found in the DirectHW library.