fixup: "hw: access VMCB State Save Area via Mmio framework"

Remove unused VMCB state accessors.

Issue genodelabs#5113

repos/base-hw/src/core/spec/x86_64/virtualization/svm.h

@@ -288,19 +288,14 @@ struct Board::Vmcb_buf
 	Segment idtr { range_at(State_off + 0x80) };
 	Segment   tr { range_at(State_off + 0x90) };
 
-	struct Cpl            : Register<State_off +  0xCB, 8> { };
 	struct Efer           : Register<State_off +  0xD0,64> { };
 	struct Cr4            : Register<State_off + 0x148,64> { };
 	struct Cr3            : Register<State_off + 0x150,64> { };
 	struct Cr0            : Register<State_off + 0x158,64> { };
 	struct Dr7            : Register<State_off + 0x160,64> { };
-	struct Dr6            : Register<State_off + 0x168,64> { };
 	struct Rflags         : Register<State_off + 0x170,64> { };
 	struct Rip            : Register<State_off + 0x178,64> { };
 	struct Rsp            : Register<State_off + 0x1D8,64> { };
-	struct S_cet          : Register<State_off + 0x1E0,64> { };
-	struct Ssp            : Register<State_off + 0x1E8,64> { };
-	struct Isst_addr      : Register<State_off + 0x1F0,64> { };
 	struct Rax            : Register<State_off + 0x1F8,64> { };
 	struct Star           : Register<State_off + 0x200,64> { };
 	struct Lstar          : Register<State_off + 0x208,64> { };
@@ -312,11 +307,6 @@ struct Board::Vmcb_buf
 	struct Sysenter_eip   : Register<State_off + 0x238,64> { };
 	struct Cr2            : Register<State_off + 0x240,64> { };
 	struct G_pat          : Register<State_off + 0x268,64> { };
-	struct Debugctl       : Register<State_off + 0x270,64> { };
-	struct Br_from        : Register<State_off + 0x278,64> { };
-	struct Br_to          : Register<State_off + 0x280,64> { };
-	struct Lastexcpfrom   : Register<State_off + 0x288,64> { };
-	struct Spec_ctrl      : Register<State_off + 0x2E0,64> { };
 };