soc: qcom: Remove lagacy scm_call API support

Legacy smc_call support is depricated, so remove
scm_call and scm_call_atomic* related calls support.

Change-Id: I32b9b7638080911ed167db11ae15bbfe589537e5
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>