This function is not used by any driver anymore. So completely remove it.

Link: https://lore.kernel.org/r/20211124154116.916-6-pali@kernel.orgSigned-off-by: NPali Rohár <pali@kernel.org>
Signed-off-by: NLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: NRussell King (Oracle) <rmk+kernel@armlinux.org.uk>