Adjust whitespace and case to match the other cmake files

CMakeLists.txt

@@ -69,13 +69,13 @@ if(PLASMA_TARGETS STREQUAL "Ethereal")
     add_definitions(-DSTREAM_LOGGER)
 endif(PLASMA_TARGETS STREQUAL "Ethereal")
 
-INCLUDE(TestBigEndian)
-TEST_BIG_ENDIAN(BIG_ENDIAN)
-IF(BIG_ENDIAN)
-     ADD_DEFINITIONS(-DBIG_ENDIAN)
-ELSE()
-     ADD_DEFINITIONS(-DLITTLE_ENDIAN)
-ENDIF()
+include(TestBigEndian)
+test_big_endian(BIG_ENDIAN)
+if(BIG_ENDIAN)
+    add_definitions(-DBIG_ENDIAN)
+else()
+    add_definitions(-DLITTLE_ENDIAN)
+endif()
 
 if(MSVC)
     add_definitions(-D_CRT_SECURE_NO_WARNINGS)