mfd: syscon: Remove extern from function prototypes

[ Upstream commit 0db017f8 ]

The kernel coding style does not require 'extern' in function prototypes
in .h files, so remove them as they are not needed.

To avoid checkpatch warnings such as
CHECK: Lines should not end with a '('
+struct regmap *syscon_regmap_lookup_by_phandle(

The indentation is also updated. No functional changes in this patch.

Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Link: https://lore.kernel.org/r/20240220115012.471689-3-peter.griffin@linaro.org


Signed-off-by: Lee Jones <lee@kernel.org>
Stable-dep-of: 805f7aaf ("mfd: syscon: Fix race in device_node_get_regmap()")
Signed-off-by: Sasha Levin <sashal@kernel.org>