splash: splashf() should be voiced if given an IDPTR
Most calls to splashf() use str(IDNUM), those can be safely
moved to ID2P(IDNUM) now. Those will follow.
This change effectively makes splash() a simple wrapper around
splashf() so just make it into a #define instead..
Change-Id: I820e74e34cb4be3f523b25ce3f5dcc341bdba3e4