soc/intel/broadwell: Fix {}, () and conditional issues

Fix the following errors and warnings detected by checkpatch:

ERROR: open brace '{' following struct go on the same line
ERROR: return is not a function, parentheses are not required
ERROR: do not use assignment in if condition
ERROR: trailing statements should be on next line
WARNING: else is not generally useful after a break or return
WARNING: braces {} are not necessary for single statement blocks
WARNING: braces {} are not necessary for any arm of this statement

TEST=None

Change-Id: I9414341b0c778c252db33f0ef4847b9530681d96
Signed-off-by: Lee Leahy <Leroy.P.Leahy@intel.com>
Reviewed-on: https://review.coreboot.org/18884
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins)
12 files changed