omap-common: Rename set_muxconf_regs_essential to set_muxconf_regs

There is no distinction between essential and non-essential mux configuration,
so it doesn't make sense to have an "essential" prefix.

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
diff --git a/board/compulab/cm_t54/mux.c b/board/compulab/cm_t54/mux.c
index da35383..45d868f 100644
--- a/board/compulab/cm_t54/mux.c
+++ b/board/compulab/cm_t54/mux.c
@@ -75,10 +75,10 @@
 };
 
 /*
- * Routine: set_muxconf_regs_essential
+ * Routine: set_muxconf_regs
  * Description: setup board pinmux configuration.
  */
-void set_muxconf_regs_essential(void)
+void set_muxconf_regs(void)
 {
 	do_set_mux((*ctrl)->control_padconf_core_base,
 		   core_padconf_array_essential,