qlcnic: update version to 5.0.6

#define _QLCNIC_LINUX_MAJOR 5

#define _QLCNIC_LINUX_MINOR 0

#define _QLCNIC_LINUX_SUBVERSION 5

#define QLCNIC_LINUX_VERSIONID  "5.0.5"

#define _QLCNIC_LINUX_SUBVERSION 6

#define QLCNIC_LINUX_VERSIONID  "5.0.6"

#define QLCNIC_DRV_IDC_VER  0x01

#define QLCNIC_VERSION_CODE(a, b, c)	(((a) << 24) + ((b) << 16) + (c))