at91bootstrap: update at91bootstrap v4 targets to v4.0.3

Update AT91Bootstrap v4 capable targets to v4.0.3.
Signed-off-by: NClaudiu Beznea <claudiu.beznea@microchip.com>
(cherry picked from commit 859f5f9a)

package/boot/at91bootstrap/Makefile

@@ -9,9 +9,9 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=at91bootstrap
-PKG_VERSION:=v4.0.1
-PKG_MIRROR_HASH:=3d45a4bcb52162097d4cdf042b8fe1ccf53e88b512e7541f42a23f2a73692a69
-PKG_SOURCE_VERSION:=4d41296e9ae12379555fb46a941897e7264600a2
+PKG_VERSION:=v4.0.3
+PKG_MIRROR_HASH:=1ecdc31a13350fcdcaa3f77ed8ad73906f79fc668dbb2f337e1d5dd877bf9882
+PKG_SOURCE_VERSION:=1d9e673698d9db4a4f2301559f481274de2e75ae
 BINARIES_DIR:=build/binaries
 
 AT91BOOTSTRAP_V4=y