ARM: 9117/1: asm-generic: div64: Remove always-true __div64_const32_is_OK()

Since commit cafa0010 ("Raise the minimum required gcc version
to 4.6"), the kernel can no longer be compiled using gcc-3.
Hence __div64_const32_is_OK() is always true, and the corresponding
check can thus be removed.

While at it, remove the whitespace error that hurts my eyes, and add the
missing curly braces for the final else statement, as per coding style.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>