Enable driver for Realtek card readers

Enable PCI card reader found on some Intel NUC models, along with the USB
drivers as well.

Adds two new modules (listed with size):

30104   /lib/modules/6.1.68-haos/kernel/drivers/misc/cardreader/rtsx_usb.ko
167240  /lib/modules/6.1.68-haos/kernel/drivers/misc/cardreader/rtsx_pci.ko

Fixes #2688

buildroot-external/board/pc/generic-x86-64/kernel.config

@@ -38,6 +38,9 @@ CONFIG_MMC_SDHCI_ACPI=y
 CONFIG_MMC_SDHCI_PCI=y
 CONFIG_X86_INTEL_LPSS=y
 
+CONFIG_MISC_RTSX_PCI=m
+CONFIG_MISC_RTSX_USB=m
+
 CONFIG_SND_SOC=m
 
 CONFIG_SND_SOC_INTEL_SST_TOPLEVEL=y