driver: net: fsl-mc: Increase MC command timeout

dpni_create API take takes more time as comapred to existing supported
APIs of MC Flib.
So increase MC command timeout.

Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
diff --git a/drivers/net/fsl-mc/mc_sys.c b/drivers/net/fsl-mc/mc_sys.c
index 2136670..71e1456 100644
--- a/drivers/net/fsl-mc/mc_sys.c
+++ b/drivers/net/fsl-mc/mc_sys.c
@@ -32,7 +32,7 @@
 		    struct mc_command *cmd)
 {
 	enum mc_cmd_status status;
-	int timeout = 6000;
+	int timeout = 12000;
 
 	mc_write_command(mc_io->mmio_regs, cmd);