surfaceflinger: Add ifdefs for secure display query

 * The HWC_SECURE feature is only implemented for devices using
   QC-CAF hwcomposers.

Change-Id: I1aa72864ba6a0e62fd7cee74631b57200db3db4f
exynos4: getphys implementation on buffermanager for samsung omx

Change-Id: Iee665f56aaf601479d796703db983ca5fce9c5c3
ui: exynos4: getphys is common

Change-Id: I1dc9c2ced0700072e7c30c8435676873b10c7026