MAINTAINERS: update AMD SPI maintainer

'Sanjay R Mehta' is no longer with AMD, I will take over as the
maintainer of the AMD SPI driver moving forward.

I request to be added as the new maintainer.

Signed-off-by: Raju Rangoju <Raju.Rangoju@amd.com>
Link: https://patch.msgid.link/20241104062327.1228521-1-Raju.Rangoju@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: RajuRangoju

MAINTAINERS

@@ -1181,8 +1181,9 @@ F:	Documentation/hid/amd-sfh*
 F:	drivers/hid/amd-sfh-hid/
 
 AMD SPI DRIVER
-M:	Sanjay R Mehta <sanju.mehta@amd.com>
-S:	Maintained
+M:	Raju Rangoju <Raju.Rangoju@amd.com>
+L:	linux-spi@vger.kernel.org
+S:	Supported
 F:	drivers/spi/spi-amd.c
 
 AMD XGBE DRIVER