MAINTAINERS: Add phy-miphy28lp.c and phy-miphy365x.c to ARCH/STI architecture

This patch adds the phy-miphy28lp.c and phy-miphy365x.c phy drivers found on
STMicroelectronics stih407 family SoC's into the STI arch section of the
maintainers file.
Signed-off-by: NPeter Griffin <peter.griffin@linaro.org>
Acked-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NKishon Vijay Abraham I <kishon@ti.com>

MAINTAINERS

@@ -1457,6 +1457,8 @@ F:	drivers/clocksource/arm_global_timer.c
 F:	drivers/i2c/busses/i2c-st.c
 F:	drivers/media/rc/st_rc.c
 F:	drivers/mmc/host/sdhci-st.c
+F:	drivers/phy/phy-miphy28lp.c
+F:	drivers/phy/phy-miphy365x.c
 F:	drivers/phy/phy-stih407-usb.c
 F:	drivers/phy/phy-stih41x-usb.c
 F:	drivers/pinctrl/pinctrl-st.c