ARM pxa: fix clock lookup to find specific device clocks

ARM pxa: fix clock lookup to find specific device clocks

commit: a0dd005d1d9f4c3beab52086f3844ef9342d1e67

Ensure that the clock lookup always finds an entry for a specific
device and ID before it falls back to finding just by ID.  This
fixes a problem reported by Holger Schurig where the BTUART was
assigned the wrong clock.

Tested-by: Holger Schurig <hs4233@mail.mn-solutions.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Uli Luckas notes:

  The patch fixes the otherwise unusable bluetooth uart on pxa25x. The
  patch is written by Russell King [1] who also gave his OK for
  stable inclusion [2].  The patch is also available as commit
  a0dd005d1d9f4c3beab52086f3844ef9342d1e67 to Linus' tree.

  [1] http://marc.info/?l=linux-arm-kernel&m=120298366510315
  [2] http://marc.info/?l=linux-arm-kernel&m=120384388411097

Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>