Command usage cleanup

Remove command name from all command "usage" fields and update
common/command.c to display "name - usage" instead of
just "usage". Also remove newlines from command usage fields.

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
diff --git a/board/freescale/common/pixis.c b/board/freescale/common/pixis.c
index 96820ac..eb76d93 100644
--- a/board/freescale/common/pixis.c
+++ b/board/freescale/common/pixis.c
@@ -280,7 +280,7 @@
 
 U_BOOT_CMD(
 	   diswd, 1, 0, pixis_disable_watchdog_cmd,
-	   "diswd	- Disable watchdog timer \n",
+	   "Disable watchdog timer",
 	   NULL);
 
 #ifdef CONFIG_PIXIS_SGMII_CMD
@@ -539,7 +539,7 @@
 
 U_BOOT_CMD(
 	pixis_reset, CONFIG_SYS_MAXARGS, 1, pixis_reset_cmd,
-	"pixis_reset - Reset the board using the FPGA sequencer\n",
+	"Reset the board using the FPGA sequencer",
 	"    pixis_reset\n"
 	"    pixis_reset [altbank]\n"
 	"    pixis_reset altbank wd\n"
diff --git a/board/freescale/mpc8610hpcd/mpc8610hpcd_diu.c b/board/freescale/mpc8610hpcd/mpc8610hpcd_diu.c
index 2320c0f..2b2d5d7 100644
--- a/board/freescale/mpc8610hpcd/mpc8610hpcd_diu.c
+++ b/board/freescale/mpc8610hpcd/mpc8610hpcd_diu.c
@@ -138,7 +138,7 @@
 
 U_BOOT_CMD(
 	diufb, CONFIG_SYS_MAXARGS, 1, mpc8610diu_init_show_bmp,
-	"diufb - Init or Display BMP file\n",
+	"Init or Display BMP file",
 	"init\n    - initialize DIU\n"
 	"addr\n    - display bmp at address 'addr'\n"
 	);