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>

env/common.c

@@ -84,7 +84,7 @@ void set_default_env(const char *s)
 	if (himport_r(&env_htab, (char *)default_environment,
 			sizeof(default_environment), '\0', flags, 0,
 			0, NULL) == 0)
-		error("Environment import failed: errno = %d\n", errno);
+		pr_err("Environment import failed: errno = %d\n", errno);
 
 	gd->flags |= GD_FLG_ENV_READY;
 	gd->flags |= GD_FLG_ENV_DEFAULT;
@@ -172,7 +172,7 @@ int env_import(const char *buf, int check)
 	/* Decrypt the env if desired. */
 	ret = env_aes_cbc_crypt(ep, 0);
 	if (ret) {
-		error("Failed to decrypt env!\n");
+		pr_err("Failed to decrypt env!\n");
 		set_default_env("!import failed");
 		return ret;
 	}
@@ -183,7 +183,7 @@ int env_import(const char *buf, int check)
 		return 1;
 	}
 
-	error("Cannot import environment: errno = %d\n", errno);
+	pr_err("Cannot import environment: errno = %d\n", errno);
 
 	set_default_env("!import failed");
 
@@ -247,7 +247,7 @@ int env_export(env_t *env_out)
 	res = (char *)env_out->data;
 	len = hexport_r(&env_htab, '\0', 0, &res, ENV_SIZE, 0, NULL);
 	if (len < 0) {
-		error("Cannot export environment: errno = %d\n", errno);
+		pr_err("Cannot export environment: errno = %d\n", errno);
 		return 1;
 	}