MAINTAINERS: Add Siddharth Vadapalli as PCI TI DRA7XX/J721E reviewer

Since I have been contributing to the driver for a while and wish to help
with the review process, add myself as a reviewer.

Link: https://lore.kernel.org/r/20240216065926.473805-1-s-vadapalli@ti.comSigned-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

MAINTAINERS

@@ -16832,6 +16832,7 @@ F:	drivers/pci/controller/dwc/*designware*
 
 PCI DRIVER FOR TI DRA7XX/J721E
 M:	Vignesh Raghavendra <vigneshr@ti.com>
+R:	Siddharth Vadapalli <s-vadapalli@ti.com>
 L:	linux-omap@vger.kernel.org
 L:	linux-pci@vger.kernel.org
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)