arm64: dts: ti: k3-am62-verdin: Fix SPI_1 GPIO CS pinctrl label

arm64: dts: ti: k3-am62-verdin: Fix SPI_1 GPIO CS pinctrl label

Fix SPI_1_CS GPIO pinmux label, this is spi1_cs, not qspi1_io4.

There are no user of this label yet, therefore this change does not
create any compatibility issue.

Fixes: fcb335934c51 ("arm64: dts: ti: verdin-am62: Improve spi1 chip-select pinctrl")
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Link: https://patch.msgid.link/20260324093705.26730-3-francesco@dolcini.it
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>