General help message cleanup

Many of the help messages were not really helpful; for example, many
commands that take no arguments would not print a correct synopsis
line, but "No additional help available." which is not exactly wrong,
but not helpful either.

Commit ``Make "usage" messages more helpful.'' changed this
partially. But it also became clear that lots of "Usage" and "Help"
messages (fields "usage" and "help" in struct cmd_tbl_s respective)
were actually redundant.

This patch cleans this up - for example:

Before:
	=> help dtt
	dtt - Digital Thermometer and Thermostat

	Usage:
	dtt         - Read temperature from digital thermometer and thermostat.

After:
	=> help dtt
	dtt - Read temperature from Digital Thermometer and Thermostat

	Usage:
	dtt

Signed-off-by: Wolfgang Denk <wd@denx.de>

cpu/arm_cortexa8/omap3/board.c

@@ -335,8 +335,8 @@ usage:
 U_BOOT_CMD(
 	nandecc, 2, 1,	do_switch_ecc,
 	"nandecc - switch OMAP3 NAND ECC calculation algorithm\n",
-	"[hw/sw] - Switch between NAND hardware (hw) or software (sw) ecc algorithm\n"
-	);
+	"[hw/sw] - Switch between NAND hardware (hw) or software (sw) ecc algorithm"
+);
 
 #endif /* CONFIG_NAND_OMAP_GPMC */
 

cpu/mpc512x/iim.c

@@ -389,6 +389,6 @@ U_BOOT_CMD(
 	"			    no args for entire bank\n"
 	"fuse prog <frow_bit> 	- program fuse at row <frow>, bit <_bit>\n"
 	"			    <frow> is 0-31, <bit> is 0-7; eg. 13_2 \n"
-	"			  WARNING - this is permanent\n"
-	);
+	"			  WARNING - this is permanent"
+);
 #endif /* CONFIG_CMD_FUSE */

cpu/mpc512x/speed.c

@@ -138,7 +138,7 @@ int do_clocks (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 
 U_BOOT_CMD(clocks, 1, 0, do_clocks,
 	"print clock configuration",
-	"    clocks\n"
+	"    clocks"
 );
 
 int prt_mpc512x_clks (void)

cpu/mpc83xx/speed.c

@@ -545,5 +545,5 @@ int do_clocks (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 
 U_BOOT_CMD(clocks, 1, 0, do_clocks,
 	"print clock configuration",
-	"    clocks\n"
+	"    clocks"
 );

cpu/nios/asmi.c

@@ -48,7 +48,7 @@
 	"asmi write addr offset count\n"\
 	"    - write count bytes to offset from addr.\n"\
 	"asmi verify addr offset count\n"\
-	"    - verify count bytes at offset from addr.\n"
+	"    - verify count bytes at offset from addr."
 
 
 /*-----------------------------------------------------------------------*/

cpu/nios2/epcs.c

@@ -47,7 +47,7 @@
 	"epcs write addr offset count\n"\
 	"    - write count bytes to offset from addr.\n"\
 	"epcs verify addr offset count\n"\
-	"    - verify count bytes at offset from addr.\n"
+	"    - verify count bytes at offset from addr."
 
 
 /*-----------------------------------------------------------------------*/

cpu/nios2/sysid.c

@@ -53,6 +53,6 @@ int do_sysid (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 U_BOOT_CMD(
 	sysid,	1,	1,	do_sysid,
 	"display Nios-II system id",
-	"\n    - display Nios-II system id\n"
+	""
 );
 #endif /* CONFIG_SYS_NIOS_SYSID_BASE */