MAINTAINERS: update Andreas Hindborg's email address

Move away from corporate infrastructure for upstream work. Also update
mailmap.

Signed-off-by: Andreas Hindborg <a.hindborg@kernel.org>
Link: https://lore.kernel.org/r/20240903200956.68231-1-a.hindborg@kernel.org
[ Reworded title slightly. - Miguel ]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>

.mailmap

@@ -60,6 +60,7 @@ Amit Nischal <quic_anischal@quicinc.com> <anischal@codeaurora.org>
 Andi Kleen <ak@linux.intel.com> <ak@suse.de>
 Andi Shyti <andi@etezian.org> <andi.shyti@samsung.com>
 Andreas Herrmann <aherrman@de.ibm.com>
+Andreas Hindborg <a.hindborg@kernel.org> <a.hindborg@samsung.com>
 Andrej Shadura <andrew.shadura@collabora.co.uk>
 Andrej Shadura <andrew@shadura.me> <andrew@beldisplaytech.com>
 Andrew Morton <akpm@linux-foundation.org>

MAINTAINERS

@@ -3863,7 +3863,7 @@ F:	kernel/trace/blktrace.c
 F:	lib/sbitmap.c
 
 BLOCK LAYER DEVICE DRIVER API [RUST]
-M:	Andreas Hindborg <a.hindborg@samsung.com>
+M:	Andreas Hindborg <a.hindborg@kernel.org>
 R:	Boqun Feng <boqun.feng@gmail.com>
 L:	linux-block@vger.kernel.org
 L:	rust-for-linux@vger.kernel.org
@@ -19911,7 +19911,7 @@ R:	Boqun Feng <boqun.feng@gmail.com>
 R:	Gary Guo <gary@garyguo.net>
 R:	Björn Roy Baron <bjorn3_gh@protonmail.com>
 R:	Benno Lossin <benno.lossin@proton.me>
-R:	Andreas Hindborg <a.hindborg@samsung.com>
+R:	Andreas Hindborg <a.hindborg@kernel.org>
 R:	Alice Ryhl <aliceryhl@google.com>
 L:	rust-for-linux@vger.kernel.org
 S:	Supported