cleanup: remove whitespace noise in cr_touch

No funcional changes, just a whitespace cleanup of cr_touch sources,
not cleaned up in commit b33d19cb833ff2160bffee80cba960935a40b682.
Bugfix #7: CRTouch: Some release events are omitted

The RTST flag (pressed touch) does not depend on the RTSRDY flag
(new coordinate data).
Bugfix #8: CRTouch: TouchPending signal unused

The TouchPending signal can be turned on/off by commenting/uncommenting
the CRTCH_ENABLE_TOUCHPENDING definition.