qcom: MAINTAINERS: add linux-msm IRC on OFTC

Qualcomm SoC community gathers in #linux-msm channel on OFTC, so mention
it in the maintainer entries.

Signed-off-by: Krzysztof Kozlowski <[e-mail]>
Reviewed-by: Dmitry Baryshkov <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Bjorn Andersson <[e-mail]>

MAINTAINERS

···
 
 ARM/QUALCOMM MAILING LIST
 L:	[e-mail]
+C:	irc://irc.oftc.net/linux-msm
 F:	Documentation/devicetree/bindings/*/qcom*
 F:	Documentation/devicetree/bindings/soc/qcom/
 F:	arch/arm/boot/dts/qcom/
···
 M:	Konrad Dybcio <[e-mail]>
 L:	[e-mail]
 S:	Maintained
+C:	irc://irc.oftc.net/linux-msm
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux.git
 F:	Documentation/devicetree/bindings/arm/qcom-soc.yaml
 F:	Documentation/devicetree/bindings/arm/qcom.yaml
···
 M:	Bjorn Andersson <[e-mail]>
 L:	[e-mail]
 S:	Maintained
+C:	irc://irc.oftc.net/linux-msm
 F:	Documentation/devicetree/bindings/pinctrl/qcom,*
 F:	drivers/pinctrl/qcom/