[PATCH][ARM] Handle clz, rbit types in arm pipeline descriptions

[Kyrill Tkachov]

Hi all,

I noticed that we don't have scheduling information for the clz and rbit 
instructions in any of the arm pipeline
models except the Cortex-A8 one.

This patch adds those insn types to the relevant models. They're treated 
as simple ALU operations.

Tested arm-none-eabi.

Ok for trunk?

Thanks,
Kyrill

2014-07-14  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>

     * config/arm/cortex-a15.md (cortex_a15_alu): Handle clz, rbit.
     * config/arm/cortex-a5.md (cortex_a5_alu): Likewise.
     * config/arm/cortex-a53.md (cortex_a53_alu): Likewise.
     * config/arm/cortex-a7.md (cortex_a7_alu_reg): Likewise.
     * config/arm/cortex-a9.md (cortex_a9_dp): Likewise.
     * config/arm/cortex-m4.md (cortex_m4_alu): Likewise.
     * config/arm/cortex-r4.md (cortex_r4_alu): Likewise.
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