Add an interface for GPC used by drivers to keep mega fast mix domain
power.
Signed-off-by: Li Jun <jun.li@freescale.com>
During 4.14 rebase added ifdef check for CONFIG_HAVE_IMX_GPC so that
it won't break arm64 build.
Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
