Lots of define are actually already defined in pci_regs.h, directly use
the standard defines.

Link: https://lore.kernel.org/r/20200615210608.21469-13-ansuelsmth@gmail.comSigned-off-by: NAnsuel Smith <ansuelsmth@gmail.com>
Signed-off-by: NLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: NStanimir Varbanov <svarbanov@mm-sol.com>