MAINTAINERS: add another entry for ARM/QUALCOMM SUPPORT

The files in ./include/linux/soc/qcom/ are headers to the corresponding
files in ./drivers/soc/qcom/, which are assigned to ARM/QUALCOMM SUPPORT.

Possibly, the file pattern include/linux/*/qcom* intended to match this
directory and its containing files, but unfortunately, it does not.

Hence, add a file entry for this directory to ARM/QUALCOMM SUPPORT.
Signed-off-by: NLukas Bulwahn <lukas.bulwahn@gmail.com>
Link: https://lore.kernel.org/r/20210327065642.11969-2-lukas.bulwahn@gmail.comSigned-off-by: NBjorn Andersson <bjorn.andersson@linaro.org>

MAINTAINERS

@@ -2296,6 +2296,7 @@ F:	drivers/tty/serial/msm_serial.c
 F:	drivers/usb/dwc3/dwc3-qcom.c
 F:	include/dt-bindings/*/qcom*
 F:	include/linux/*/qcom*
+F:	include/linux/soc/qcom/
 
 ARM/RADISYS ENP2611 MACHINE SUPPORT
 M:	Lennert Buytenhek <kernel@wantstofly.org>