southbridge/intel/i82801ix/lpc.c: Remove unused variable `dummy`

Removing `-Wno-unused-but-set-variable` from `CFLAGS` the build for
QEMU Q35 and Roda RK9, both using the Intel 82801Ix southbridge, fail
with the following error.

	src/southbridge/intel/i82801ix/lpc.c: In function 'i82801ix_enable_apic':
	src/southbridge/intel/i82801ix/lpc.c:45:5: error: variable 'dummy' set but not used [-Werror=unused-but-set-variable]
	cc1: all warnings being treated as errors

Removing `dummy` should be safe as GCC probably optimizes it away before
anyway. That no dummy variable is used for an RCBA [1] access in Intel
Lynx Point supports that this can be dropped safely.

[1] root complex base address
[2] src/southbridge/intel/lynxpoint/early_pch.c

Change-Id: I1c138a3498228dbd025f68d5e6af0acc29ed3460
Signed-off-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-on: http://review.coreboot.org/3982
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@google.com>

0 files changed, 0 insertions, 0 deletions