ARM: dts: microchip: sama5d2: fix spi flexcom fifo size to 32

ARM: dts: microchip: sama5d2: fix spi flexcom fifo size to 32

Unlike standalone spi peripherals, on sama5d2, the flexcom spi have fifo
size of 32 data. Fix flexcom/spi nodes where this property is wrong.

Fixes: 6b9a3584c7ed ("ARM: dts: at91: sama5d2: Add missing flexcom definitions")
Cc: stable@vger.kernel.org # 5.8+
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20251114140225.30372-1-nicolas.ferre@microchip.com
Signed-off-by: Claudiu Beznea <claudiu.beznea@tuxon.dev>