trivial: fix typos/grammar errors in Kconfig texts

Signed-off-by: Matt LaPlante <kernel1@cyberdogtech.com>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 74cc312..2e2160c 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -342,7 +342,7 @@
 	help
 	  Hypervisor-assisted dump is meant to be a kdump replacement
 	  offering robustness and speed not possible without system
-	  hypervisor assistence.
+	  hypervisor assistance.
 
 	  If unsure, say "N"