fix(linux): Remove PRU SW UART from TOC

PRU SW UART is currently not supported, remove from TOC and
remove rst file since it is no longer used.

Signed-off-by: Judith Mendez <jm@ti.com>

Author: jmenti

configs/AM335X/AM335X_linux_toc.txt

@@ -88,7 +88,6 @@ linux/Foundational_Components/PRU-ICSS/Linux_Drivers/RemoteProc
 linux/Foundational_Components/PRU-ICSS/Linux_Drivers/RPMsg
 linux/Foundational_Components/PRU-ICSS/RPMsg_Quick_Start_Guide
 linux/Foundational_Components/PRU-ICSS/Linux_Drivers/PRU-ICSS_Ethernet
-linux/Foundational_Components/PRU-ICSS/Linux_Drivers/pru-sw-uart
 linux/Foundational_Components/PRU-ICSS/Linux_Drivers/pruss-uart
 linux/Foundational_Components/PRU-ICSS-Hardware
 linux/Foundational_Components/PRU-ICSS/PRU-EVMs

configs/AM437X/AM437X_linux_toc.txt

@@ -89,7 +89,6 @@ linux/Foundational_Components/PRU-ICSS/Linux_Drivers/RemoteProc
 linux/Foundational_Components/PRU-ICSS/Linux_Drivers/RPMsg
 linux/Foundational_Components/PRU-ICSS/RPMsg_Quick_Start_Guide
 linux/Foundational_Components/PRU-ICSS/Linux_Drivers/PRU-ICSS_Ethernet
-linux/Foundational_Components/PRU-ICSS/Linux_Drivers/pru-sw-uart
 linux/Foundational_Components/PRU-ICSS-Hardware
 linux/Foundational_Components/PRU-ICSS/PRU-EVMs
 linux/Foundational_Components/PRU-ICSS-Training

configs/AM57X/AM57X_linux_toc.txt

@@ -94,7 +94,6 @@ linux/Foundational_Components/PRU-ICSS/Linux_Drivers/RemoteProc
 linux/Foundational_Components/PRU-ICSS/Linux_Drivers/RPMsg
 linux/Foundational_Components/PRU-ICSS/RPMsg_Quick_Start_Guide
 linux/Foundational_Components/PRU-ICSS/Linux_Drivers/PRU-ICSS_Ethernet
-linux/Foundational_Components/PRU-ICSS/Linux_Drivers/pru-sw-uart
 linux/Foundational_Components/PRU-ICSS-Hardware
 linux/Foundational_Components/PRU-ICSS/PRU-EVMs
 linux/Foundational_Components/PRU-ICSS-Training