msm-core: debug: Fix the number of arguments for sysfs nodes

Ptable and enable node parses the input arguments incorrectly. Parse the
input message into exact number of arguments that are required for the
respective nodes.

CRs-fixed: 1032875
Change-Id: I881f18217b703a497efa4799288dee39a28ea8ab
Signed-off-by: Archana Sathyakumar <asathyak@codeaurora.org>