libnvdimm: Fix ACPI_NFIT in BLK_DEV_PMEM help

The ACPI_NFIT config option is described incorrectly as the
inverse NFIT_ACPI, which doesn't exist, so update the help
to the actual config option.
Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
Link: https://lore.kernel.org/r/20240212123716.795996-1-pbrobinson@gmail.comSigned-off-by: Dave Jiang <dave.jiang@intel.com>

drivers/nvdimm/Kconfig

@@ -24,7 +24,7 @@ config BLK_DEV_PMEM
 	select ND_PFN if NVDIMM_PFN
 	help
 	  Memory ranges for PMEM are described by either an NFIT
-	  (NVDIMM Firmware Interface Table, see CONFIG_NFIT_ACPI), a
+	  (NVDIMM Firmware Interface Table, see CONFIG_ACPI_NFIT), a
 	  non-standard OEM-specific E820 memory type (type-12, see
 	  CONFIG_X86_PMEM_LEGACY), or it is manually specified by the
 	  'memmap=nn[KMG]!ss[KMG]' kernel command line (see