Error found in sparc build:

../../common/io/pciex/pcie.c:3036: error: unused variable 'ev_attr_list' [-Wunused-variable]
../../common/io/pciex/pcie.c:3035: error: unused variable 'eid' [-Wunused-variable]
../../common/io/pciex/pcie.c:3034: error: unused variable 'se_val' [-Wunused-variable]
../../common/io/pciex/pcie.c:3033: error: unused variable 'se' [-Wunused-variable]
../../common/io/pciex/pcie.c:3032: error: unused variable 'cdip' [-Wunused-variable]

Now, the pcie Makefile on intel gags the unused variable warning

CERRWARN	+= -_gcc=-Wno-unused-variable

But sparc doesn't, so we trip over this.

With the fix, clean build on both intel and sparc.