RISC-V: Remove udivdi3

This should never have landed in the first place: it was added as part
of 64-bit divide support for 32-bit systems, but the kernel doesn't
allow this sort of division.  I must have forgotten to remove it.

This patch removes the support.  Since this routine only worked on
64-bit platforms but was only built on 32-bit platforms, it's
essentially just nonsense anyway.

Signed-off-by: Palmer Dabbelt <[email protected]>
Acked-by: Nicolas Pitre <[email protected]>
Link: https://lore.kernel.org/linux-riscv/[email protected]/T/#t
Reported-by: Eric Lin <[email protected]>
Signed-off-by: Paul Walmsley <[email protected]>

Author: palmer-dabbelt

arch/riscv/lib/Makefile

@@ -5,5 +5,3 @@ lib-y	+= memset.o
 lib-y	+= uaccess.o
 
 lib-$(CONFIG_64BIT) += tishift.o
-
-lib-$(CONFIG_32BIT) += udivdi3.o