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>

1 files changed, 6 insertions, 5 deletions

diff --git a/common/cmd_ximg.c b/common/cmd_ximg.c
index a45d248..5593b2d 100644
--- a/common/cmd_ximg.c
+++ b/common/cmd_ximg.c
@@ -180,11 +180,12 @@ do_imgextract(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 }
 
 U_BOOT_CMD(imxtract, 4, 1, do_imgextract,
-	   "extract a part of a multi-image",
-	   "addr part [dest]\n"
-	   "    - extract <part> from legacy image at <addr> and copy to <dest>\n"
+	"extract a part of a multi-image",
+	"addr part [dest]\n"
+	"    - extract <part> from legacy image at <addr> and copy to <dest>"
 #if defined(CONFIG_FIT)
-	   "addr uname [dest]\n"
-	   "    - extract <uname> subimage from FIT image at <addr> and copy to <dest>\n"
+	"\n"
+	"addr uname [dest]\n"
+	"    - extract <uname> subimage from FIT image at <addr> and copy to <dest>"
 #endif
 );