treewide: replace with error() with pr_err()

U-Boot widely uses error() as a bit noisier variant of printf().

This macro causes name conflict with the following line in
include/linux/compiler-gcc.h:

  # define __compiletime_error(message) __attribute__((error(message)))

This prevents us from using __compiletime_error(), and makes it
difficult to fully sync BUILD_BUG macros with Linux.  (Notice
Linux's BUILD_BUG_ON_MSG is implemented by using compiletime_assert().)

Let's convert error() into now treewide-available pr_err().

Done with the help of Coccinelle, excluing tools/ directory.

The semantic patch I used is as follows:

// <smpl>
@@@@
-error
+pr_err
 (...)
// </smpl>

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
[trini: Re-run Coccinelle]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/board/samsung/goni/goni.c b/board/samsung/goni/goni.c
index d0247ac..debc4c5 100644
--- a/board/samsung/goni/goni.c
+++ b/board/samsung/goni/goni.c
@@ -102,7 +102,7 @@
 
 	ret = s5p_mmc_init(0, 4);
 	if (ret)
-		error("MMC: Failed to init MMC:0.\n");
+		pr_err("MMC: Failed to init MMC:0.\n");
 
 	/*
 	 * SD card (T_FLASH) detect and init
@@ -127,7 +127,7 @@
 
 		ret_sd = s5p_mmc_init(2, 4);
 		if (ret_sd)
-			error("MMC: Failed to init SD card (MMC:2).\n");
+			pr_err("MMC: Failed to init SD card (MMC:2).\n");
 	}
 
 	return ret & ret_sd;