board: beagleplay: Fix the bootpart to pick from root partition

The Kernel Image and DTB files are supposed to be picked from the rootfs
of the SD Card, this fails in legacy boot flow because bootpart is set
to 1:1. Fix it.

Fixes: a200f428b5b21 ("board: ti: am62x: Add am62x_beagleplay_* defconfigs and env file")
Reviewed-by: Nishanth Menon <nm@ti.com>
Acked-by: Chirag Shilwant <c-shilwant@ti.com>
Signed-off-by: Dhruva Gole <d-gole@ti.com>
diff --git a/board/beagle/beagleplay/beagleplay.env b/board/beagle/beagleplay/beagleplay.env
index 8dbfc2f..354bc98 100644
--- a/board/beagle/beagleplay/beagleplay.env
+++ b/board/beagle/beagleplay/beagleplay.env
@@ -12,7 +12,7 @@
 	led led-2 on; led led-3 off; led led-4 on
 boot=mmc
 mmcdev=1
-bootpart=1:1
+bootpart=1:2
 bootdir=/boot
 boot_targets=mmc1 mmc0
 bootmeths=script extlinux efi pxe