Add support for nRF24L01+ radio module

Author: ogorodnik

components/src/radio/nrf24l01p/README.md

@@ -0,0 +1,10 @@
+This directory contains the driver for nRF24L01+ radio module. The nRF24AP2
+ICs are low-cost, high-performance 2.4 GHz ISM single-chip connectivity devices
+with an embedded ANT protocol stack.
+
+nRF24L01 can also be driven with some reservations. For example, for Air_Data_Rate
+use Rate_250kbps (2Mbps on nRF24L01) or Rate_1Mbps (1Mbps on nRF24L01) only.
+Refer to the specifications for more information.
+
+The examples/STM32F429_Discovery/nrf24l01p_f429disco.gpr project contains
+a simple example.