pinctrl: sunxi: f1c100s: Fix signal name comment for PA2 SPI pin

The manual describes function 0x6 of pin PA2 as "SPI1_CLK", so change
the comment to reflect that.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Link: https://lore.kernel.org/r/20220504170736.2669595-1-andre.przywara@arm.com


Signed-off-by: Linus Walleij <linus.walleij@linaro.org>