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[ Upstream commit 67d7745b ]

The Module Select Register 0 contains 20 (= 5 x 4) reserved bits, and 12
single-bit fields, but the variable field descriptor lacks a field of 4
reserved bits.

Fixes: b92ac66a

 ("pinctrl: sh-pfc: Add R8A77970 PFC support")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>