novacustom_nv4x_adl -> novacustom-nv4x_adl consistent NovaCustom board naming scheme from now on

[tlaurion]

To confirm:

user@heads-tests-deb12-nix:~/heads$ grep -Rni mainboard config/coreboot-novacustom-nv4x_adl.config 
55:# Mainboard
114:CONFIG_MAINBOARD_FAMILY="Not Applicable"
115:CONFIG_MAINBOARD_PART_NUMBER="nv40pz"
116:CONFIG_MAINBOARD_VERSION="v2.1"
117:CONFIG_MAINBOARD_DIR="clevo/adl-p"
122:CONFIG_MAINBOARD_VENDOR="Notebook"
136:CONFIG_MAINBOARD_SMBIOS_MANUFACTURER="Notebook"
137:CONFIG_INTEL_GMA_VBT_FILE="src/mainboard/$(MAINBOARDDIR)/variants/$(VARIANT_DIR)/data.vbt"
140:CONFIG_CMOS_DEFAULT_FILE="src/mainboard/$(MAINBOARDDIR)/cmos.default"
141:CONFIG_CMOS_LAYOUT_FILE="src/mainboard/$(MAINBOARDDIR)/cmos.layout"
145:CONFIG_MAINBOARD_SMBIOS_PRODUCT_NAME="NV4xPZ"
222:CONFIG_MAINBOARD_POWER_FAILURE_STATE=0
223:# end of Mainboard
724:CONFIG_MAINBOARD_HAS_TPM2=y
815:CONFIG_MAINBOARD_SERIAL_NUMBER="123456789"

and

user@heads-tests-deb12-nix:~/heads$ grep -Rni bios config/coreboot-novacustom-nv4x_adl.config 
69:# CONFIG_VENDOR_BIOSTAR is not set
135:# CONFIG_VGA_BIOS is not set
136:CONFIG_MAINBOARD_SMBIOS_MANUFACTURER="Notebook"
145:CONFIG_MAINBOARD_SMBIOS_PRODUCT_NAME="NV4xPZ"
256:CONFIG_EXT_BIOS_WIN_BASE=0xf8000000
257:CONFIG_EXT_BIOS_WIN_SIZE=0x2000000
368:CONFIG_FAST_SPI_SUPPORTS_EXT_BIOS_WINDOW=y
532:CONFIG_BIOS_VENDOR="3mdeb"
575:# CONFIG_DUMP_SMBIOS_TYPE17 is not set
814:CONFIG_GENERATE_SMBIOS_TABLES=y
828:# CONFIG_PAYLOAD_SEABIOS is not set
852:# CONFIG_SEABIOS_SECONDARY_PAYLOAD is not set
user@heads-tests-deb12-nix:~/heads$ 

Amongst other string validation if necessary (futureproofing fwupd/DTS/internal EC automatic upgrade etc and other things i'm not thinking of/aware of).

@macpijan please do review approving this pr for merge, assigning to you.

[tlaurion]

@macpijan ping (this should then be release commit)