clang-format: change it to better match our style

These additions make a better fit to our style, they
are adapted from those done for Linux.

Change-Id: I664c9d1503e3bb7bedcd617e15d2d2c57e19bdff
Signed-off-by: Ronald G. Minnich <rminnich@gmail.com>
Reviewed-on: https://review.coreboot.org/27752
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

.clang-format

@@ -7,4 +7,15 @@ AllowShortIfStatementsOnASingleLine:       false
 IndentCaseLabels:				false
 SortIncludes:					false
 ContinuationIndentWidth:			8
-ColumnLimit:                               80
+ColumnLimit:					0
+AlwaysBreakBeforeMultilineStrings:		true
+AllowShortLoopsOnASingleLine:			false
+AllowShortFunctionsOnASingleLine:		false
+AlignEscapedNewlinesLeft:			false
+AlignTrailingComments:				true
+AllowAllParametersOfDeclarationOnNextLine:	false
+AlignAfterOpenBracket:				true
+SpaceAfterCStyleCast:				false
+MaxEmptyLinesToKeep:				2
+BreakBeforeBinaryOperators:			NonAssignment
+BreakStringLiterals:				false