kernel-dev: Spell checked the files and fixed appropriately.

(From yocto-docs rev: 0b9510d009f6437179c3848fc14c94af07ab99e2)

Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/kernel-dev/kernel-dev-advanced.xml

@@ -30,7 +30,7 @@
         This Metadata defines Board Support Packages (BSPs) that
         correspond to definitions in linux-yocto recipes for the same BSPs.
         A BSP consists of an aggregation of kernel policy and hardware-specific
-        feature enablement.
+        feature enablements.
         The BSP can be influenced from within the linux-yocto recipe.
         <note>
             Linux kernel source that contains kernel Metadata is said to be
@@ -787,7 +787,7 @@
             </literallayout>
             The <filename>include</filename> command midway through the file
             includes the <filename>fri2.scc</filename> description that
-            defines all hardware enablement for the BSP that is common to all
+            defines all hardware enablements for the BSP that is common to all
             kernel types.
             Using this command significantly reduces duplication.
         </para>