MAINTAINERS: add entry for STM32 OCTO MEMORY MANAGER driver

Add myself as STM32 OCTO MEMORY MANAGER maintainer.

Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Link: https://lore.kernel.org/r/20250428-upstream_ospi_v6-v11-3-1548736fd9d2@foss.st.com
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Author: Patrice Chotard

MAINTAINERS

@@ -22881,6 +22881,12 @@ L:	linux-i2c@vger.kernel.org
 S:	Maintained
 F:	drivers/i2c/busses/i2c-stm32*
 
+ST STM32 OCTO MEMORY MANAGER
+M:	Patrice Chotard <patrice.chotard@foss.st.com>
+S:	Maintained
+F:	Documentation/devicetree/bindings/memory-controllers/st,stm32mp25-omm.yaml
+F:	drivers/memory/stm32_omm.c
+
 ST STM32 SPI DRIVER
 M:	Alain Volmat <alain.volmat@foss.st.com>
 L:	linux-spi@vger.kernel.org