fastboot: Refactor fastboot_okay/fail to take response

Add the response string as a parameter to fastboot_okay/fail, instead
of modifying a global, to match the contract expected by the AOSP
U-Boot code.

Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com>
Reviewed-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/include/fastboot.h b/include/fastboot.h
index 009f1a7..ed52dae 100644
--- a/include/fastboot.h
+++ b/include/fastboot.h
@@ -15,7 +15,7 @@
 /* The 64 defined bytes plus \0 */
 #define FASTBOOT_RESPONSE_LEN	(64 + 1)
 
-void fastboot_fail(const char *reason);
-void fastboot_okay(const char *reason);
+void fastboot_fail(const char *reason, char *response);
+void fastboot_okay(const char *reason, char *response);
 
 #endif /* _FASTBOOT_H_ */
diff --git a/include/fb_mmc.h b/include/fb_mmc.h
index a2d7c48..39a960c 100644
--- a/include/fb_mmc.h
+++ b/include/fb_mmc.h
@@ -4,5 +4,5 @@
  */
 
 void fb_mmc_flash_write(const char *cmd, void *download_buffer,
-			unsigned int download_bytes);
-void fb_mmc_erase(const char *cmd);
+			unsigned int download_bytes, char *response);
+void fb_mmc_erase(const char *cmd, char *response);
diff --git a/include/fb_nand.h b/include/fb_nand.h
index 3daae8c..2c92a4e 100644
--- a/include/fb_nand.h
+++ b/include/fb_nand.h
@@ -5,5 +5,5 @@
  */
 
 void fb_nand_flash_write(const char *cmd, void *download_buffer,
-			 unsigned int download_bytes);
-void fb_nand_erase(const char *cmd);
+			 unsigned int download_bytes, char *response);
+void fb_nand_erase(const char *cmd, char *response);
diff --git a/include/image-sparse.h b/include/image-sparse.h
index f39dc16..234c237 100644
--- a/include/image-sparse.h
+++ b/include/image-sparse.h
@@ -23,7 +23,7 @@
 				 lbaint_t blk,
 				 lbaint_t blkcnt);
 
-	void		(*mssg)(const char *str);
+	void		(*mssg)(const char *str, char *response);
 };
 
 static inline int is_sparse_image(void *buf)
@@ -38,4 +38,4 @@
 }
 
 int write_sparse_image(struct sparse_storage *info, const char *part_name,
-		       void *data);
+		       void *data, char *response);