uboot, kernel: use hex address for UBOOT_ENTRYPOINT

Compiling a FIT image with this default values and dump it with
dumpimage shows decimal converted values. For example the default value
20008000 looks like this:

 Image 0 (kernel-1)
  ...
  Load Address: 0x01314c40
  Entry Point:  0x01314c40

With this change the expected value is printed by dumpimage.

(From OE-Core rev: e6f2ca9135ef7da8f8b5925957532734c06e55cc)

Signed-off-by: Adrian Freihofer <adrian.freihofer@siemens.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes-recipe/kernel.bbclass

@@ -233,7 +233,7 @@ KERNEL_VERSION = "${@get_kernelversion_headers('${B}')}"
 PACKAGE_ARCH = "${MACHINE_ARCH}"
 
 # U-Boot support
-UBOOT_ENTRYPOINT ?= "20008000"
+UBOOT_ENTRYPOINT ?= "0x20008000"
 UBOOT_LOADADDRESS ?= "${UBOOT_ENTRYPOINT}"
 
 # Some Linux kernel configurations need additional parameters on the command line

meta/classes-recipe/uboot-config.bbclass

@@ -19,7 +19,7 @@ def removesuffix(s, suffix):
         return s[:-len(suffix)]
     return s
 
-UBOOT_ENTRYPOINT ?= "20008000"
+UBOOT_ENTRYPOINT ?= "0x20008000"
 UBOOT_LOADADDRESS ?= "${UBOOT_ENTRYPOINT}"
 
 # Some versions of u-boot use .bin and others use .img.  By default use .bin