firmware: qcom: Remove garbage characters from qsee log

Send proper buffer size to fix the garbage characters
appearing on qsee logs.

Test: 1. Basic Bootup with all subsystems out of
         reset on secboot device
      2. SSR on secboot device (Modem, ADSP, CDSP)
      3. All flags set in APDP except JTAG
      4. All flags set to 0 in APDP
      5. Only offline dump flag set in APDP
      6. Only NS dump flag set in APDP
      7. Only Enable Logs flag set in APDP

Change-Id: Ia472b6d0478399e4df81803151c4bd757266ad7d
Signed-off-by: Vaibhav Agrawal <vagrawa@codeaurora.org>