pmic: Convert pm8916 driver to a generic Qcom PMIC driver

Since both pm8916.c and pm8916_gpio.c are already supporting multiple
Qcom SoCs, it makes sense to rename these drivers to pmic_qcom.c and
qcom_pmic_gpio.c respectively. Also, these driver can be extended to
support additional functionality if required for other Qcom SoCs.

Along with this import latest DT binding: qcom,spmi-pmic.txt from Linux
kernel and thereby remove pm8916.txt.

Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
diff --git a/configs/starqltechn_defconfig b/configs/starqltechn_defconfig
index 2d07767..4f84f5f 100644
--- a/configs/starqltechn_defconfig
+++ b/configs/starqltechn_defconfig
@@ -23,10 +23,10 @@
 # CONFIG_DM_STDIO is not set
 CONFIG_CLK=y
 CONFIG_MSM_GPIO=y
-CONFIG_PM8916_GPIO=y
+CONFIG_QCOM_PMIC_GPIO=y
 CONFIG_PINCTRL=y
 CONFIG_DM_PMIC=y
-CONFIG_PMIC_PM8916=y
+CONFIG_PMIC_QCOM=y
 # CONFIG_REQUIRE_SERIAL_CONSOLE is not set
 CONFIG_SPMI_MSM=y
 CONFIG_DM_VIDEO=y