package/kexec: enable powerpc64 platform

kexec has fully support of ppc64 platform:
https://www.kernel.org/doc/Documentation/kdump/kdump.txt
Added BR2_powerpc64 platform support.

Signed-off-by: Artem Senichev <artemsen@gmail.com>
Reviewed-by: Matthew Weber <matthew.weber@rockwellcollins.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/kexec/Config.in

@@ -2,7 +2,8 @@ config BR2_PACKAGE_KEXEC
 	bool "kexec"
 	depends on BR2_i386 || BR2_x86_64 || BR2_arm || BR2_armeb || \
 		BR2_mips || BR2_mips64 || BR2_mipsel || BR2_mips64el || \
-		BR2_powerpc || BR2_powerpc64le || BR2_sh4 || BR2_sh4a || BR2_aarch64
+		BR2_powerpc || BR2_powerpc64 || BR2_powerpc64le || \
+		BR2_sh4 || BR2_sh4a || BR2_aarch64
 	help
 	  Kexec is a user space utility for loading another kernel
 	  and asking the currently running kernel to do something with