mailmap: update Bhupesh's email address

Update Bhupesh's email to his new one.

Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>

.mailmap

@@ -30,6 +30,7 @@ Atish Patra <atishp@atishpatra.org> <atish.patra@wdc.com>
 Bharat Kumar Gogada <bharat.kumar.gogada@amd.com> <bharat.kumar.gogada@xilinx.com>
 Bharat Kumar Gogada <bharat.kumar.gogada@amd.com> <bharatku@xilinx.com>
 Bhargava Sreekantappa Gayathri <bhargava.sreekantappa-gayathri@amd.com> <bhargava.sreekantappa-gayathri@xilinx.com>
+Bhupesh Sharma <bhupesh.linux@gmail.com> <bhupesh.sharma@linaro.org>
 Bin Meng <bmeng.cn@gmail.com> <bin.meng@windriver.com>
 Boris Brezillon <bbrezillon@kernel.org> <boris.brezillon@bootlin.com>
 Boris Brezillon <bbrezillon@kernel.org> <boris.brezillon@free-electrons.com>