microblaze: Add support for new cpu versions and target architecture

Update PVR values based on reference manual.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/arch/microblaze/kernel/cpu/cpuinfo.c b/arch/microblaze/kernel/cpu/cpuinfo.c
index 0b2299b..410398f 100644
--- a/arch/microblaze/kernel/cpu/cpuinfo.c
+++ b/arch/microblaze/kernel/cpu/cpuinfo.c
@@ -37,6 +37,8 @@
 	{"8.20.a", 0x15},
 	{"8.20.b", 0x16},
 	{"8.30.a", 0x17},
+	{"8.40.a", 0x18},
+	{"8.40.b", 0x19},
 	{NULL, 0},
 };
 
@@ -57,6 +59,9 @@
 	{"virtex6", 0xe},
 	/* FIXME There is no key code defined for spartan2 */
 	{"spartan2", 0xf0},
+	{"kintex7", 0x10},
+	{"artix7", 0x11},
+	{"zynq7000", 0x12},
 	{NULL, 0},
 };