MAINTAINERS: Update AMD SPI driver maintainers

Due to additional responsibilities, Raju Rangoju will no longer be
supporting AMD SPI driver. Maintenance will be handled by Krishnamoorthi
going forward.

Cc: Krishnamoorthi M <krishnamoorthi.m@amd.com>
Signed-off-by: Raju Rangoju <Raju.Rangoju@amd.com>
Link: https://patch.msgid.link/20260406091042.4065767-1-Raju.Rangoju@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: RajuRangoju

MAINTAINERS

@@ -1272,6 +1272,7 @@ F:	drivers/hid/amd-sfh-hid/
 
 AMD SPI DRIVER
 M:	Raju Rangoju <Raju.Rangoju@amd.com>
+M:	Krishnamoorthi M <krishnamoorthi.m@amd.com>
 L:	linux-spi@vger.kernel.org
 S:	Supported
 F:	drivers/spi/spi-amd-pci.c