qcom: secure_buffer: Use enum type to hold VMID definitions

#include <linux/scatterlist.h>

#define VMID_HLOS 0x3

#define VMID_CP_TOUCH 0x8

#define VMID_CP_BITSTREAM 0x9

#define VMID_CP_PIXEL 0xA

#define VMID_CP_NON_PIXEL 0xB

#define VMID_CP_CAMERA 0xD

#define VMID_HLOS_FREE 0xE

#define VMID_MSS_MSA 0xF

#define VMID_MSS_NONMSA 0x10

#define VMID_CP_SEC_DISPLAY 0x11

#define VMID_CP_APP 0x12

#define VMID_WLAN 0x18

#define VMID_WLAN_CE 0x19

#define VMID_INVAL -1

/*

 * if you add a secure VMID here make sure you update

 * msm_secure_vmid_to_string

 * msm_secure_vmid_to_string.

 * Make sure to keep the VMID_LAST as the last entry in the enum.

 * This is needed in ion to create a list and it's sized using VMID_LAST.

 */

enum vmid {

	VMID_HLOS = 0x3,

	VMID_CP_TOUCH = 0x8,

	VMID_CP_BITSTREAM = 0x9,

	VMID_CP_PIXEL = 0xA,

	VMID_CP_NON_PIXEL = 0xB,

	VMID_CP_CAMERA = 0xD,

	VMID_HLOS_FREE = 0xE,

	VMID_MSS_MSA = 0xF,

	VMID_MSS_NONMSA = 0x10,

	VMID_CP_SEC_DISPLAY = 0x11,

	VMID_CP_APP = 0x12,

	VMID_WLAN = 0x18,

	VMID_WLAN_CE = 0x19,

	VMID_LAST,

	VMID_INVAL = -1

};

#define PERM_READ                       0x4

#define PERM_WRITE                      0x2