MAINTAINERS: Drop Gustavo Pimentel as EDMA Reviewer

Gustavo Pimentel seems to have left Synopsys, so his email is bouncing.
And there is no indication from him expressing willingness to
continue contributing to the driver.

So let's drop him from the MAINTAINERS entry.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Link: https://lore.kernel.org/r/20240326085256.12639-1-manivannan.sadhasivam@linaro.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>

Author: Mani-Sadhasivam

MAINTAINERS

@@ -6067,7 +6067,6 @@ F:	drivers/mtd/nand/raw/denali*
 
 DESIGNWARE EDMA CORE IP DRIVER
 M:	Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
-R:	Gustavo Pimentel <gustavo.pimentel@synopsys.com>
 R:	Serge Semin <fancer.lancer@gmail.com>
 L:	dmaengine@vger.kernel.org
 S:	Maintained