staging: cxt1e1: Removed assignments from if statements.

Assignments removed from if statements.
Fixed checkpatch warning such as indentation and negative error returns in
adjacent code.

Coccinelle was used for this patch. The following script found the match:
@simple@
expression E1, E2;
statement S1, S2;
@@

+ E1 = E2;
  if (
-     (E1 = E2)
+     E1
     )
  S1 else S2

@left@
expression E0, E1, E2;
statement S1, S2;
@@

+ E1 = E2;
  if (
-     (E1 = E2)
+     E1
         == E0
     )
  S1 else S2

Signed-off-by: Chi Pham <fempsci@gmail.com>
Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>