CI: Rework rockchip jobs in Azure

The rockchip job is getting close to the hard time limit in Azure for
the free tier. Split this in to 32bit and 64bit board jobs.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/.azure-pipelines.yml b/.azure-pipelines.yml
index 2121336..ca29479 100644
--- a/.azure-pipelines.yml
+++ b/.azure-pipelines.yml
@@ -535,8 +535,10 @@
           BUILDMAN: "uniphier"
         aarch64_catch_all:
           BUILDMAN: "aarch64 -x amlogic,bcm,imx8,imx9,k3,tegra,ls1,ls2,lx216,mvebu,uniphier,renesas,sunxi,samsung,socfpga,rk,versal,zynq"
-        rockchip:
-          BUILDMAN: "rk"
+        rockchip_32bit:
+          BUILDMAN: "rk -x aarch64"
+        rockchip_64bit:
+          BUILDMAN: "rk&aarch64"
         renesas:
           BUILDMAN: "renesas"
         zynq: