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>

drivers/net/fsl-mc/mc_sys.c

@@ -32,7 +32,7 @@ int mc_send_command(struct fsl_mc_io *mc_io,
 		    struct mc_command *cmd)
 {
 	enum mc_cmd_status status;
-	int timeout = 6000;
+	int timeout = 12000;
 
 	mc_write_command(mc_io->mmio_regs, cmd);