arch: arm: store/restore regs r0-r3 while making function call.

In benchmark test (test_info) while making function call regs
r0 - r4 are modified into called function. Due to this value
inside r3 is getting lost.
This patch saves and restore the value in r0-r4 regs while making
function calls from assembly language.

Jira: ZEP-2314

Signed-off-by: Youvedeep Singh <youvedeep.singh@intel.com>