Fix incorrect function mappings in pinctrl_qspi1_default and
pinctrl_qspi2_default since their function should be SPI1 and
SPI2 respectively.

Fixes: f510f04c ("ARM: dts: aspeed: Add AST2600 pinmux nodes")
Signed-off-by: Jae Hyun Yoo <quic_jaehyoo@quicinc.com>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Link: https://lore.kernel.org/r/20220329173932.2588289-8-quic_jaehyoo@quicinc.comSigned-off-by: Joel Stanley <joel@jms.id.au>