*Replaced BRCM SDK's psample support flag(PSAMPLE_SUPPORT) with linux kernel psample module support config flag(CONFIG_PSAMPLE) in saibcm-modules.
*Replaced BUILD_PSAMPLE conditioanl check with CONFIG_PSAMPLE to build psample callback library(psample-cb.o), only if psample config is enabled in linux kernel.
*Cleaned up PSAMPLE_SUPPORT related commented code.
Signed-off-by: haris@celestica.com
Signed-off-by: haris@celestica.com