The atmel-isc-base is getting crowded. Split the clock functions into
atmel-isc-clk.c.
Signed-off-by: NEugen Hristev <eugen.hristev@microchip.com>
Reviewed-by: NJacopo Mondi <jacopo+renesas@jmondi.org>
Signed-off-by: NHans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab@kernel.org>