msm: pcie: add ARM32 support for mdmcalifornium

Currently, PCIe bus driver on mdmcalifornium does not
have support for ARM32. Thus, add the necessary changes
to support ARM32 for PCIe on mdmcalifornium.

Change-Id: I6c72debd9ea65b7abb70ce4d5568c972ba786c11
Signed-off-by: Tony Truong <truong@codeaurora.org>