crc32: Use the crc.h header for crc functions

Drop inclusion of crc.h in common.h and use the correct header directly
instead.

With this we can drop the conflicting definition in fw_env.h and rely on
the crc.h header, which is already included.

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

env/remote.c

@@ -9,6 +9,7 @@
 #include <command.h>
 #include <env_internal.h>
 #include <linux/stddef.h>
+#include <u-boot/crc.h>
 
 #ifdef ENV_IS_EMBEDDED
 env_t *env_ptr = &environment;