commit 522624f9 upstream.

Break out definitions in sdhci-pci.c to sdhci-pci.h, for introducing
module files like sdhci-pci-xxx.c
Signed-off-by: Adam Lee <adam.lee@canonical.com>
Signed-off-by: Chris Ball <chris@printf.net>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>