ARM: dts: imx7d-pico-pi: Separate into cpu and baseboard dts

Separate the old imx7d-pico into cpu (imx7d-pico.dtsi) and baseboard (imx7d-pico-pi.dts) dts so the same cpu dtsi can be used in different baseboards variants.

---
Changes since v1:
- Use imx/dt branch
- Remove sai1 node from imx7d-pico.dtsi and add to imx7d-pico-pi.dts

 arch/arm/boot/dts/Makefile                         |   2 +-
 arch/arm/boot/dts/imx7d-pico-pi.dts                | 182 +++++++++++++++++++++
 .../boot/dts/{imx7d-pico.dts => imx7d-pico.dtsi}   | 133 ---------------
 3 files changed, 183 insertions(+), 134 deletions(-)
 create mode 100644 arch/arm/boot/dts/imx7d-pico-pi.dts
 rename arch/arm/boot/dts/{imx7d-pico.dts => imx7d-pico.dtsi} (71%)

index b5ba7ad..73dd719 100644
@@ -521,7 +521,7 @@ dtb-$(CONFIG_SOC_IMX7D) += \
 	imx7d-cl-som-imx7.dtb \
 	imx7d-colibri-eval-v3.dtb \
 	imx7d-nitrogen7.dtb \
-	imx7d-pico.dtb \
+	imx7d-pico-pi.dtb \
 	imx7d-sbc-imx7.dtb \
 	imx7d-sdb.dtb \
 	imx7d-sdb-sht11.dtb \

1.9.1

Applied, thanks.