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>
diff --git a/common/board_r.c b/common/board_r.c
index c9f476e..c0065a5 100644
--- a/common/board_r.c
+++ b/common/board_r.c
@@ -11,6 +11,7 @@
 
 #include <common.h>
 #include <api.h>
+#include <u-boot/crc.h>
 /* TODO: can we just include all these headers whether needed or not? */
 #if defined(CONFIG_CMD_BEDBUG)
 #include <bedbug/type.h>