libflash: Add option to install pflash

Extend the libflash package to also install the pflash utility. This
enables users to query and modify the PNOR safely from the host, as well
as supporting future automation changes.

Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
diff --git a/openpower/package/libflash/Config.in b/openpower/package/libflash/Config.in
index eb6f56d..3fb323f 100644
--- a/openpower/package/libflash/Config.in
+++ b/openpower/package/libflash/Config.in
@@ -2,3 +2,8 @@
 	bool "libflash"
 	help
 	  Build libflash shared library
+
+config BR2_PACKAGE_PFLASH
+	bool "pflash"
+	help
+	  Install pflash utility to target