MAINTAINERS: Add sdhci-st file to ARCH/STI architecture

Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Maxime Coquelin <maxime.coquelin@st.com>
Signed-off-by: Olof Johansson <olof@lixom.net>

MAINTAINERS

@@ -1357,6 +1357,7 @@ F:	drivers/pinctrl/pinctrl-st.c
 F:	drivers/media/rc/st_rc.c
 F:	drivers/i2c/busses/i2c-st.c
 F:	drivers/tty/serial/st-asc.c
+F:	drivers/mmc/host/sdhci-st.c
 
 ARM/TECHNOLOGIC SYSTEMS TS7250 MACHINE SUPPORT
 M:	Lennert Buytenhek <kernel@wantstofly.org>