cmd: Convert existing long help messages to the new macro

- Generally we just drop the #ifdef CONFIG_SYS_LONGHELP and endif lines
  and use U_BOOT_LONGHELP to declare the same variable name as before
- In a few places, either rename the variable to follow convention or
  introduce the variable as it was being done inline before.

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cmd/axi.c

@@ -344,11 +344,11 @@ static int do_ihs_axi(struct cmd_tbl *cmdtp, int flag, int argc,
 		return CMD_RET_USAGE;
 }
 
-static char axi_help_text[] =
+U_BOOT_LONGHELP(axi,
 	"bus  - show AXI bus info\n"
 	"axi dev [bus] - show or set current AXI bus to bus number [bus]\n"
 	"axi md size addr [# of objects] - read from AXI device at address [addr] and data width [size] (one of 8, 16, 32)\n"
-	"axi mw size addr value [count] - write data [value] to AXI device at address [addr] and data width [size] (one of 8, 16, 32)\n";
+	"axi mw size addr value [count] - write data [value] to AXI device at address [addr] and data width [size] (one of 8, 16, 32)\n");
 
 U_BOOT_CMD(axi, 7, 1, do_ihs_axi,
 	   "AXI sub-system",