Fix inconsistent std namespace usage
Signed-off-by: Rajasekaran Kalidoss rajasekaran.kalidoss@arm.com Change-Id: I53bc1747beb15b39d4395b784b1eb00cdcd05dc6
Signed-off-by: Rajasekaran Kalidoss rajasekaran.kalidoss@arm.com Change-Id: I53bc1747beb15b39d4395b784b1eb00cdcd05dc6