Remove support for the SH7372 (SH-Mobile AP4) from the renesas-tpu
driver.

Commit edf41009 ("ARM: shmobile: sh7372 dtsi: Remove Legacy
file") removed this SoC from the kernel in v4.1.
Acked-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>
Signed-off-by: NThierry Reding <thierry.reding@gmail.com>