While building with ARM toolchain relocation warnings appears
This commit will fix it for MAX32625/30 targets.

The system interrupt function is defined as weak in startup file
and its overvides in other files, Becuase of the functions is overrites
while calling it in startup modile by B XXXXX probably compiler give
info purpose warnings... By using using . instead function name it says
go existing point to the compiler.
Warning detail:
https://www.keil.com/support/man/docs/armerr/armerr_dom1365073159742.htm

Signed-off-by: Sadik.Ozer <Sadik.Ozer@maximintegrated.com>