settings: add more spellcheck words

Signed-off-by: Sean Cross <sean@xobs.io>

.vscode/settings.json

@@ -2,22 +2,40 @@
     "cSpell.words": [
         "TXFULL",
         "Uart",
+        "asid",
         "concat",
+        "ebreak",
         "ebss",
         "edata",
         "eheap",
         "estack",
         "etext",
         "getc",
+        "irqs",
+        "kernel",
+        "mcause",
+        "mext",
+        "msoft",
         "mstatus",
+        "mtimer",
         "pagetable",
+        "pending",
+        "processtable",
         "putc",
+        "riscv",
+        "rt",
         "satp",
         "sbss",
         "sdata",
+        "set",
         "sheap",
         "sidata",
         "sstack",
-        "stext"
+        "stext",
+        "syscalls",
+        "virt",
+        "vmim",
+        "vmip",
+        "xous"
     ]
 }