arm64: dts: imx8mq-librem5-r2: add missing rotation and orientation properties

the rear cam properties are duplicated in r2.
2 jobs for s5k_orientation_r2 in 71 minutes and 23 seconds
Status Name Job ID Coverage
  Build
passed build:aarch64 #372223
librem5

00:54:49

passed build:deb #372224
librem5:arm64

01:11:23