arm: dts: qcom: Sync pinctrl DT nodes with Linux bindings

Currently for all Qcom SoCs/boards there are separate compatibles for
GPIO and pinctrl. But this is inconsistent with official (upstream) Linux
bindings which requires only a single compatible "qcom,<SoC name>-pinctrl"
and there is no such compatible property as "qcom,tlmm-<SoC name>".

So fix this inconsistency for Qcom SoCs in order to comply with upstream
DT bindings. This is done via removing compatibles from "msm_gpio" driver
and via binding to "msm_gpio" driver from pinctrl driver in case
"gpio-controller" property is specified for pinctrl node.

Suggested-by: Stephan Gerhold <stephan@gerhold.net>
Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
diff --git a/arch/arm/dts/dragonboard820c-uboot.dtsi b/arch/arm/dts/dragonboard820c-uboot.dtsi
index 8610d7e..2270ac7 100644
--- a/arch/arm/dts/dragonboard820c-uboot.dtsi
+++ b/arch/arm/dts/dragonboard820c-uboot.dtsi
@@ -13,7 +13,7 @@
 	soc {
 		u-boot,dm-pre-reloc;
 
-		qcom,tlmm@1010000 {
+		pinctrl@1010000 {
 			u-boot,dm-pre-reloc;
 
 			uart {