[PATCH v2] lib: make sg_pool tristate instead of bool

[Paul Gortmaker <paul.gortmaker@windriver.com>]

The recently added Kconfig controlling compilation of this code is:

lib/Kconfig:config SG_POOL
lib/Kconfig:    def_bool n

...meaning that it currently is not being built as a module by anyone,
and that tripped my audit looking for modular code that is essentially
orphaned (i.e. module_exit, and .remove fcns in non-modular drivers.)

In the following discussion, Ming Lin indicated that the original
intention was to have it tristate, so here we convert it accordingly.

Also fix up a couple spelling issues that appear in the surrounding
patch context.

Cc: Christoph Hellwig <hch@lst.de>
Cc: Ming Lin <ming.l@ssi.samsung.com>
Cc: Sagi Grimberg <sagi@grimberg.me>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
---

[v2: drop modular code removal patch in favour of supporting a modular
 build via a one line Kconfig patch as per Ming's comments.  Build tested
 for allmodconfig on ARM and x86-64 on linux-next.   ]

 lib/Kconfig | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/Kconfig b/lib/Kconfig
index e04f168f8f42..8de5868804b5 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -528,13 +528,13 @@ config SG_SPLIT
 	help
 	 Provides a helper to split scatterlists into chunks, each chunk being
 	 a scatterlist. This should be selected by a driver or an API which
-	 whishes to split a scatterlist amongst multiple DMA channels.
+	 wishes to split a scatterlist amongst multiple DMA channels.
 
 config SG_POOL
-	def_bool n
+	def_tristate n
 	help
 	 Provides a helper to allocate chained scatterlists. This should be
-	 selected by a driver or an API which whishes to allocate chained
+	 selected by a driver or an API which wishes to allocate chained
 	 scatterlist.
 
 #
-- 
2.8.0