cmd: Enable CMD remoteproc by default for K3 ARCH

Enable CMD_REMOTEPROC by default if building for K3 ARCH so
that it does not have to be defined in each board defconfig
file.

Signed-off-by: Judith Mendez <jm@ti.com>
diff --git a/cmd/Kconfig b/cmd/Kconfig
index 4c4ad9d..4250bfc 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -1587,6 +1587,7 @@
 config CMD_REMOTEPROC
 	bool "remoteproc"
 	depends on REMOTEPROC
+	default y if ARCH_K3
 	help
 	  Support for Remote Processor control