[AMDGPU] Add missing v_permlane_up_b32 test. NFC.

Author: rampitec

llvm/test/MC/Disassembler/AMDGPU/gfx1250_dasm_vop3.txt

@@ -869,6 +869,9 @@
 0x05,0x00,0x72,0xd6,0x01,0xd5,0xf4,0x01
 # GFX1250: v_permlane_down_b32 v5, v1, vcc_lo, m0  ; encoding: [0x05,0x00,0x72,0xd6,0x01,0xd5,0xf4,0x01]
 
+0x05,0x00,0x71,0xd6,0x01,0xff,0xa8,0x01
+# GFX1250: v_permlane_up_b32 v5, v1, exec_hi, vcc_lo ; encoding: [0x05,0x00,0x71,0xd6,0x01,0xff,0xa8,0x01]
+
 0x05,0x00,0x71,0xd6,0x01,0xfd,0xf4,0x03
 # GFX1250: v_permlane_up_b32 v5, v1, exec_lo, src_scc ; encoding: [0x05,0x00,0x71,0xd6,0x01,0xfd,0xf4,0x03]