[PowerPC64LE] powernv ILE setup code.

When running without a hypervisor, we need to set the ILE bit in the LPCR
ourselves.

For the boot processor, handle it in powernv_attach() like we do for other
LPCR bits.

No change for the APs, as they will use the lpcr global to set up their own
LPCR when they do their own cpudep_ap_early_bootstrap() and pick up this
automatically.

Sponsored by:	Tag1 Consulting, Inc.

sys/powerpc/include/spr.h

@@ -292,6 +292,7 @@
 #define	SPR_LPCR		0x13e	/* .6. Logical Partitioning Control */
 #define	  LPCR_LPES		  0x008	/* Bit 60 */
 #define	  LPCR_HVICE		  0x002	/* Hypervisor Virtualization Interrupt (Arch 3.0) */
+#define	  LPCR_ILE		  (1ULL << 25) /* Interrupt Little-Endian (ISA 2.07) */
 #define	  LPCR_UPRT		  (1ULL << 22) /* Use Process Table (ISA 3) */
 #define	  LPCR_HR		  (1ULL << 20) /* Host Radix mode */
 #define	  LPCR_PECE_DRBL          (1ULL << 16) /* Directed Privileged Doorbell */

sys/powerpc/powernv/platform_powernv.c

@@ -174,6 +174,10 @@ powernv_attach(platform_t plat)
 	if (cpu_features2 & PPC_FEATURE2_ARCH_3_00)
 		lpcr |= LPCR_HVICE;
 
+#if BYTE_ORDER == LITTLE_ENDIAN
+	lpcr |= LPCR_ILE;
+#endif
+
 	mtspr(SPR_LPCR, lpcr);
 	isync();