[v1.03][RISCV] Add basic Allwinner support

src/riscv/socs.h

@@ -9,6 +9,8 @@ enum {
   SOC_SIFIVE_U740,
   // STARFIVE
   SOC_STARFIVE_VF2,
+  // ALLWINNER
+  SOC_ALLWINNER_D1H,
   // UNKNOWN
   SOC_MODEL_UNKNOWN
 };
@@ -16,6 +18,7 @@ enum {
 inline static VENDOR get_soc_vendor_from_soc(SOC soc) {
   if(soc >= SOC_SIFIVE_U740 && soc <= SOC_SIFIVE_U740) return SOC_VENDOR_SIFIVE;
   if(soc >= SOC_STARFIVE_VF2 && soc <= SOC_STARFIVE_VF2) return SOC_VENDOR_STARFIVE;
+  if(soc >= SOC_ALLWINNER_D1H && soc <= SOC_ALLWINNER_D1H) return SOC_VENDOR_ALLWINNER;
   return SOC_VENDOR_UNKNOWN;
 }