README.md: Add section on ngff_carem

This board has been around for ages and is supported from fimware + host
software.

Change-Id: I586b170fd6314af53a90d09020e41114714f1fec
diff --git a/README.md b/README.md
index 1cd2917..d24effc 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,9 @@
 * Osmocom [SIMtrace2](https://osmocom.org/projects/simtrace2/wiki) with SAM3 controller
   * this is open hardware and schematics / PCB design is published
   * pre-built hardware available from [sysmocom webshop](https://shop.sysmocom.de/SIMtrace2-Hardware-Kit/simtrace2-kit)
+* Osmocom [ngff-cardem](https://osmocom.org/projects/ngff-cardem/wiki) M.2/NGFF modem carrier with SAM3 controller
+  * this is open hardware and schematics / PCB design is published
+  * pre-built hardware available from [sysmocom webshoo](https://shop.sysmocom.de/M.2-modem-carrier-with-remote-SIM-tracing/ngff-cardem-kit-external)
 * sysmocom [sysmoQMOD](https://sysmocom.de/products/lab/sysmoqmod/index.html) (with 4 Modems,  4 SIM slots and 2 SAM3)
   * this is a proprietary device, publicly available from sysmocom
   * hardware evaluation kit available from [sysmocom webshop](https://shop.sysmocom.de/sysmoQMOD-evaluation-kit/sysmoQMOD-evk)