Add imx rpmsg rtc driver support

The driver needs cowork with pm rpmsg on imx7ulp but no compilation
dependency.

Dong Aisheng (2):
  ARM: dts: imx7ulp: add cm4 support
  rtc: imx-rpmsg: Add i.MX RPMSG RTC support

 arch/arm/boot/dts/imx7ulp-evk-m4.dtsi |  48 ++++
 arch/arm/boot/dts/imx7ulp-evk.dts     |   1 +
 arch/arm/boot/dts/imx7ulp.dtsi        |   7 +
 drivers/rtc/Kconfig                   |  10 +
 drivers/rtc/Makefile                  |   1 +
 drivers/rtc/rtc-imx-rpmsg.c           | 301 ++++++++++++++++++++++++++
 include/linux/firmware/imx/rpmsg.h    |  37 ++++
 7 files changed, 405 insertions(+)
 create mode 100644 arch/arm/boot/dts/imx7ulp-evk-m4.dtsi
 create mode 100644 drivers/rtc/rtc-imx-rpmsg.c
 create mode 100644 include/linux/firmware/imx/rpmsg.h

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2.25.1