rpi-base: build uart dts overlays by default

We need the uart dts overlays to enable a specific uart peripheral.
For example if you use the disable-bt overlay, you have to enable
the uart0 dts overlay to be able to use uart0 peripheral.

Signed-off-by: Pierrick Curt <pierrickcurt@gmail.com>

conf/machine/include/rpi-base.inc

@@ -60,6 +60,17 @@ RPI_KERNEL_DEVICETREE_OVERLAYS ?= " \
     overlays/pps-gpio.dtbo \
     overlays/rpi-ft5406.dtbo \
     overlays/rpi-poe.dtbo \
+    overlays/uart0.dtbo \
+    overlays/uart0-pi5.dtbo \
+    overlays/uart1.dtbo \
+    overlays/uart1-pi5.dtbo \
+    overlays/uart2.dtbo \
+    overlays/uart2-pi5.dtbo \
+    overlays/uart3.dtbo \
+    overlays/uart3-pi5.dtbo \
+    overlays/uart4.dtbo \
+    overlays/uart4-pi5.dtbo \
+    overlays/uart5.dtbo \
     overlays/vc4-fkms-v3d.dtbo \
     overlays/vc4-fkms-v3d-pi4.dtbo \
     overlays/vc4-kms-v3d.dtbo \