Remove pcie/test_p004.o from test_pool/Makefile
Remove pcie/test_p004.o from test_pool/Makefile

test_pool/pcie/test_p004.c was deleted in commit
7775a1729811ec695253cc4ae8d0350eeecb0671 - also remove it from
test_pool/Makefile.

Signed-off-by: Rebecca Cran <0ab09b420c3f4f686e1f6503c93d3111d2038689@nuviainc.com>

ARM-software/sbsa-acs,ARM-software/sbsa-acs