uboot-mvebu: update to v2021.07

Refresh the patches.
Switch to AUTORELEASE while at it.

Signed-off-by: Andre Heider <a.heider@gmail.com>

package/boot/uboot-mvebu/patches/210-link-libcrypto-static.patch

@@ -3,7 +3,7 @@ needed dependencies are added too.
 
 --- a/tools/Makefile
 +++ b/tools/Makefile
-@@ -158,7 +158,7 @@ ifneq ($(CONFIG_MX23)$(CONFIG_MX28)$(CON
+@@ -168,7 +168,7 @@ ifneq ($(CONFIG_MX23)$(CONFIG_MX28)$(CON
  HOSTCFLAGS_kwbimage.o += \
  	$(shell pkg-config --cflags libssl libcrypto 2> /dev/null || echo "")
  HOSTLDLIBS_mkimage += \