arm64: dts: ti: k3-am69-aquila-clover: Change main_spi2 CS0 to GPIO mode

arm64: dts: ti: k3-am69-aquila-clover: Change main_spi2 CS0 to GPIO mode

Change CS0 from hardware chip select to GPIO-based chip select to
align with the base aquila device tree configuration.

Fixes: 9f748a6177e1 ("arm64: dts: ti: am69-aquila: Add Clover")
Cc: stable@vger.kernel.org
Signed-off-by: Vitor Soares <vitor.soares@toradex.com>
Reviewed-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Link: https://patch.msgid.link/20260112175350.79270-3-ivitro@gmail.com
Signed-off-by: Nishanth Menon <nm@ti.com>