Harmonize name with MEGA65 IO map

src/aliases/,aliases_hardware_m65.s

@@ -91,7 +91,7 @@
 
 	; MISC registers
 
-	!addr MISC_BOARDID    = $D629 ; board identification byte
+	!addr MISC_M65MODEL   = $D629 ; board identification byte
 	!addr MISC_EMU        = $D710 ; to enable badlines and slow interrupts
 
 	; Hypervisor traps

src/basic/basic_commands_04/cmd_sysinfo.s

@@ -53,7 +53,7 @@ print_sysinfo_banner:
 	ldx #IDX__STR_SI_HDR_HW
 	jsr print_packed_misc_str
 
-	lda MISC_BOARDID
+	lda MISC_M65MODEL
 	ldy #(__cmd_sysinfo_hw_ids_end - cmd_sysinfo_hw_ids - 1)
 @2:
 	cmp cmd_sysinfo_hw_ids, y
@@ -69,7 +69,7 @@ print_sysinfo_banner:
 	cpx #IDX__STR_SI_HW_XX
 	bne @4
 
-	lda MISC_BOARDID
+	lda MISC_M65MODEL
 	jsr print_hex_byte
 @4: