staging: rtl8192e: rename local variables of function dot11d_update_country - style

Rename following local variables of function dot11d_update_country to
fix checkpatch warning: Avoid CamelCase and make the variable names more
readable, understandable.
	NumTriples -> number_of_triples
	MaxChnlNum -> max_channel_number
	pTriple -> triple

Signed-off-by: Himadri Pandya <himadri18.07@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>