armv8: fsl-layerscape: Make USB masters snoopable

Program register bit of SCFG_SNPCNFGCR_USBxRDSNP and
SCFG_SNPCNFGCR_USBxWRSNP(x = 1, 2, 3) to drive USBx read/write
snoop signal on LS1043A and LS1046A.

Signed-off-by: Ran Wang <ran.wang_1@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
diff --git a/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch2.h b/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch2.h
index 3a59abb..862ec2e 100644
--- a/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch2.h
+++ b/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch2.h
@@ -409,6 +409,12 @@
 #define SCFG_SNPCNFGCR_SECWRSNP		0x40000000
 #define SCFG_SNPCNFGCR_SATARDSNP	0x00800000
 #define SCFG_SNPCNFGCR_SATAWRSNP	0x00400000
+#define SCFG_SNPCNFGCR_USB1RDSNP	0x00200000
+#define SCFG_SNPCNFGCR_USB1WRSNP	0x00100000
+#define SCFG_SNPCNFGCR_USB2RDSNP	0x00008000
+#define SCFG_SNPCNFGCR_USB2WRSNP	0x00010000
+#define SCFG_SNPCNFGCR_USB3RDSNP	0x00002000
+#define SCFG_SNPCNFGCR_USB3WRSNP	0x00004000
 
 /* RGMIIPCR bit definitions*/
 #define SCFG_RGMIIPCR_EN_AUTO		BIT(3)