arm64: dts: amlogic: Fix SPI NOR flash node name for ODROID N2/N2+

arm64: dts: amlogic: Fix SPI NOR flash node name for ODROID N2/N2+

Fix the schema warning: "spi-flash@0: $nodename:0: 'spi-flash@0' does
 not match '^flash(@.*)?$'" from jedec,spi-nor.yaml

Fixes: a084eaf3096c ("arm64: dts: meson-g12b-odroid-n2: add SPIFC controller node")
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Alexander Stein <alexander.stein@mailbox.org>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://lore.kernel.org/r/20211026182813.900775-3-alexander.stein@mailbox.org