MAINTAINERS: repair file entry in AIROHA SPI SNFI DRIVER

Commit a403997c ("spi: airoha: add SPI-NAND Flash controller driver")
adds a new section AIROHA SPI SNFI DRIVER referring to the file
spi-airoha.c. The commit however adds the file spi-airoha-snfi.c.

Hence, ./scripts/get_maintainer.pl --self-test=patterns complains about a
broken reference.

Repair this file entry in the AIROHA SPI SNFI DRIVER section.
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@redhat.com>
Link: https://lore.kernel.org/r/20240507141449.177538-1-lukas.bulwahn@redhat.comSigned-off-by: Mark Brown <broonie@kernel.org>

MAINTAINERS

@@ -660,7 +660,7 @@ L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 L:	linux-spi@vger.kernel.org
 S:	Maintained
 F:	Documentation/devicetree/bindings/spi/airoha,en7581-snand.yaml
-F:	drivers/spi/spi-airoha.c
+F:	drivers/spi/spi-airoha-snfi.c
 
 AIRSPY MEDIA DRIVER
 L:	linux-media@vger.kernel.org