boot/xilinx-embeddedsw: fix menuconfig visualization

Due to how menuconfig works, a 'comment' entry following a 'config' entry
prevents correct indentation of items depending on the 'config'
entry. xilinx-embeddedsw currently shows as:

  [*] xilinx-embeddedsw
      *** xilinx-embeddedsw needs a bare metal toolchain for tuple microblazeel-xilinx-elf ***
  (xilinx_v2024.2) xilinx-embeddedsw version (NEW)
  [ ] versal plm (NEW)
  [ ] versal psmfw (NEW)
  [ ] zynqmp pmufw (NEW)
  [ ] xilinx-prebuilt

So the 'versal *' and 'zynqmp pmufw' items are not indented even though
they should be.

Do like most other Config.in files which have the 'comment' before the
'config' entry, makeing it render as expected:

      *** xilinx-embeddedsw needs a bare metal toolchain for tuple microblazeel-xilinx-elf ***
  [*] xilinx-embeddedsw
  (xilinx_v2024.2) xilinx-embeddedsw version (NEW)
  [ ]   versal plm (NEW)
  [ ]   versal psmfw (NEW)
  [ ]   zynqmp pmufw (NEW)
  [ ] xilinx-prebuilt

Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Reviewed-by: Neal Frager <neal.frager@amd.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>
(cherry picked from commit 088808ccc74323dc78439c6980e9760b5be1dee2)

boot/xilinx-embeddedsw/Config.in

@@ -1,3 +1,6 @@
+comment "xilinx-embeddedsw needs a bare metal toolchain for tuple microblazeel-xilinx-elf"
+	depends on BR2_TOOLCHAIN_BARE_METAL_BUILDROOT_ARCH != "microblazeel-xilinx-elf"
+
 config BR2_TARGET_XILINX_EMBEDDEDSW
 	bool "xilinx-embeddedsw"
 	depends on BR2_aarch64
@@ -14,9 +17,6 @@ config BR2_TARGET_XILINX_EMBEDDEDSW
 	  Applications can be found on the Xilinx embeddedsw repo:
 	  https://github.com/Xilinx/embeddedsw/tree/master/lib/sw_apps
 
-comment "xilinx-embeddedsw needs a bare metal toolchain for tuple microblazeel-xilinx-elf"
-	depends on BR2_TOOLCHAIN_BARE_METAL_BUILDROOT_ARCH != "microblazeel-xilinx-elf"
-
 if BR2_TARGET_XILINX_EMBEDDEDSW
 
 config BR2_TARGET_XILINX_EMBEDDEDSW_VERSION